Use soap water to saturate the sandpaper. How do you smooth out the final coat of polyurethane? The first kind of polyurethane is water-based polyurethane for floors which has a clear finish when it is applied directly onto the wood. The finish may look wet, but chances are it's already sticky, and brushing will only make a mess. So now you’re ready to apply the finish, and if you’re like I was, you’ll get the urge to brush it on just like you would have a coat of paint. Allow the varnish or lacquer to dry for one day, then level-sand with 400-grit sandpaper to remove bumps and imperfections. Without the liquid, material can build up in the sandpaper and leave behind scratches that are larger than the particle size, ruining your finish. How do I smooth polyurethane after it dries but still maintain its finish? FWIW I usually clear or paint after 800. it leaves a smooth finish with enough bike for most paints. To achieve the highest level of gloss, and to create the smoothest possible finish, wet sanding each coat of polyurethane is the preferred method. Removing cloudiness may require sanding. If the finish “balls up” or seems wet, let it dry some more. How do you make a matte finish with polyurethane? Will the scuff marks dissapear as I transition to a higher grit paper? It depends. A flawless surface is elusive. Most of our tabletops are finished with polyurethane varnish. Beginners Guide To Wet Sanding A Polyurethane Finish If you want your wood project to have the smoothest finish possible, then wet-sanding it is your best bet. To achieve the highest level of gloss, and to create the smoothest possible finish, wet sanding each coat of polyurethane is the preferred method. Sand the bare wood as needed to smooth it and remove the old finish. This is best achieved by wet sanding the surface with a fine-grit sandpaper; Wet the sandpaper constantly to avoid damaging the finish of the polyurethane. Therefore, if you are looking to apply water-based poly formula over the stain, you should ensure that you sand the surface before you can apply your finish. Polishing Polyurethane to a High Gloss Buffing compounds, sanding materials, and techniques for that super-high final shine. Once the final lacquer coats have cured, most finishers begin wet-sanding with fine-grit finishing papers. What's the difference between Koolaburra by UGG and UGG? Wet-sanding will reduce the scratch pattern somewhat as well, compared to sanding at the same grit dry, but the main 'secret' is that you then use some polishing agents to buff/polish the surface. It’s important to varnish the wood and dry-sand it carefully first. Inspect the polyurethane finish after it is dry to the touch. Sand your wood with at least 220-grit sandpaper. It is imperative that polyurethane be allowed to cure thoroughly before wet sanding to get the best results. Then, if you want less sheen, dull the finish by wet sanding or wiping on a couple of coats of satin or semigloss. Prepare the polyurethane by reducing it about 10 percent with mineral spirits, unless you're using water-based polyurethane, which doesn't need thinning. Also, it is essential, especially when applying water-based polyurethane to an oil-based stain. Always keep the sandpaper wet, and sand in gentle circles. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. I have never heard of any one using olive oil to "wet sand". Rest a razor blade's edge almost parallel with the polyurethane surface, and carefully cut away any bumps or … If the stain is very uniform and the wood has no imperfections and is very smooth, then a light pass with one of the Scotch type pads should be just enough. White spots on polyurethane are generally caused by two things: Not stirring thoroughly enough before applying it, or a buildup of moisture. This is what I did when I first started, and why I quickly moved over to wipe on poly as it was much easier. For open-grain woods (like oak, ash, or walnut), you can apply a wood grain filler before the polyurethane, to create an ultra-smooth finished surface. After rubbing, let the surface dry and buff the finish with a clean, dry cloth. Use 1500 and 2000-grits for ultra-delicate sanding. Note: The compound has a fine abrasive that’ll remove any scratches left by the 400-grit sandpaper and restore the luster in the polyurethane finish. But with closed-grained woods like maple or birch, don’t skip any grit steps, and go all the way to 220 grit. One caveat: Sanding an oil finish wet (or even sanding dry between coats) is risky if you have stained the wood. You’ll also want to choose wet sandpaper and soak it for a while before you use it. JavaScript is disabled. NOTE: Before sanding, test on an inconspicuous part of the surface to ensure that the poly is completely dry. Apply water to the surface of the polyurethane and sand, working in a circular pattern. This is the length of time it takes for the oxygen-induced crosslinking to occur. What is the clairvoyance buff in Terraria? Can you rub out polyurethane finish? Instead, you are going to want to do one of two things; Instead, you are going to want to do one of two things; Wet Sand The Wood: This method of sanding involves using water, or some other lubricant, to help remove the scratches as you sand (ideally without marking the surface any further). When working with polyurethane, wet sanding is the best way to ensure a smooth finish. If the spot is small, you can touch it up with a furniture marker. Tip 3: Wipe the project with mineral spirits. Do not spend a lot of time sanding, you don’t want to risk going through the finish and exposing raw wood. Even high quality finishing papers will build up quickly when used dry. You don’t have to that though, you can use it dry if you prefer. Use this sponge wrapped sandpaper to sand the layer of the clear coat. I'm a rookie. Stearated paper has dry lubricants that help prevent “corning” or the balling up of finish on the paper. Asked By: Cloe Tones | Last Updated: 20th May, 2020. 6 Go with Polyurethane. It can be used on both single and two stage paints. The abrasive paper lasts much longer and you can see immediately what the sanding result is. Sanding through all the grits to 220 grit won’t improve the finish one bit. Thinning the polyurethane makes it flow on more smoothly and reduces brush marks. You’ll also want to choose wet sandpaper and soak it for a while before you use it. Quick Tip! There are lots of clear finishes. Sand the surface to get rid of dust or debris that got stuck there during the drying process. The final coats keep having minor bubble spots and/or lint/dust spots. Use 400-grit wet or dry sandpaper and sand the polyurethane wood finish. Place a rubber sanding block with 320-grit wet/dry sandpaper on it into the pan. Yes, you can apply polyurethane over the stain. Wet Sanding The Final Coat of Polyurethane Finish. With a wipe on poly 3 coats usually equal 1 coat of brush on poly so since you sanded between coats you probably are at about 1 coat. I would wipe the table down with naphtha if you have it or mineral spirits would be my second choice. Can you use steel wool between coats of polyurethane? Prepare your workpiece A glass-smooth finish begins with a level, even surface. Look closely, at eye level, across the surface of the dried polyurethane for any bumps or dust specks. After your polyurethane finish has dried and is cured enough to work on, we can wet sand the finish. The reason for using the water-based polyurethane is because it doesn’t contain any volatile organic compounds (VOCs). Use enough water to lubricate the sandpaper so you won't burn through the delicate finish. You can get it silky smooth this way, but it's a lot of work and not easy to obtain consistency and evenness. Smoothly remove materials or sags if any created due to the clearcoat layers. 1-2 coats risks sanding through to the wood, apply 4-5 coats to be safe. However, the quality and protection of most film building finishes (such as polyurethane, lacquer, and shellac) goes up exponentially on the first few coats (e.g., there’s a huge improvement in durability and moisture excluding effectiveness from coat #1 to coat #2, and another big jump from coat #2 up to coat #3.) This type of polyurethane dries up easily so one can walk on the floors within 10 hours of application. However, wet sanding does require a certain amount of finesse. Let … If the finish “balls up” or seems wet, let it dry some more. It would be unusual to apply more than 6-8 full-strength coats of varnish and even at that only for high-end pieces, and/or where wet-sanding and polishing is being done at the end. If the sanding was minimal, you can get away with just re-coating the sanded area. That required 1500 and 2000 grit wet sanding. Do not spend a lot of time sanding, you don’t want to risk going through the finish and exposing raw wood. Adding a faster-evaporating thinner doesn’t speed this crosslinking. Load a sanding block with 600-grit wet/dry paper, dribble on some soapy water and rub the finish smooth. A still-wet finish will typically flow back on itself, but it can help to apply a bit more finish on top of the area. Sand the dried and cured first coat of polyurethane no sooner than 24 hours after applying it. Wipe Instead of Brush. Tip 4: Use a roller on large, flat surfaces. It’s important to varnish the wood and dry-sand it carefully first. Saturate a piece of wet and dry sandpaper with a 1000-grit in water, sand the polyurethane finish in small, circular motions, and then clean it with a pH-neutral cleanser to remove any visible debris. And use a sanding block too, this will help keep the surface flat. 11 / 24. Then the finish goes into a tacky or sticky stage for an hour or longer. Using 320 grit wet-or-dry paper (cut with scissors into 1 1/2" squares and backed by a squared rubber eraser), the stock is wet sanded with the same 1 to 2 solution of finish. If you get dust nibs or brush marks in the finish, sanding will smooth them, and your next coat will look better if you work on a smooth surface. Polyurethane is the modern product most often used as varnish, or clear finish, on stained and painted wood surfaces. Polishing Polyurethane to a High Gloss Buffing compounds, sanding materials, and techniques for that super-high final shine. Obviously, do not use electric sanders when wet-sanding. Start the process exactly like above with 400 or 600 grit paper. Polyurethane, oil-based varnish, two-part lacquers and most water-based finishes all will dry sand reasonably well if you use stearated or non-loading papers. This is plenty smooth for a great finish. In general, the best liquid to use for most materials is water with a little bit of detergent in it. I generally start at 80 grit and end with 100 or 120 grit. You can choose to use wood sanders with rough sandpaper to etch … Leave the first coat to dry properly for 24 hours. Also Know, what happens if you don't sand between coats of polyurethane? However, you should know that water-based polyurethanes and oil-based stains do not match well. Thoroughly remove sand… Wet-Sand Before Final Coats. Wipe the soapy sanded left over from the wood surface. Do you sand after final coat of Polycrylic? For most of us, finishing means applying varnish, polyurethane, or paint with a brush. Wet sanding will remove orange peal, improving the clarity and imagine in the paint. Wet sanding is good for getting a smooth, glossy finish, especially on flat areas. I maybe talking out my blow hose.. You may have sanded deep into the finish since wipe on poly is like 3 coats of wiping to one coat of brush on. When wet-sanding scratches, avoid creating a dip by feathering out the area as described in the sidebar at right. Laying on polyurethane isn’t the best way to hide sanding marks and scratches. (In both cases proceed through all buffing stages.) Then sanding polyurethane can be done. Which elements are most likely to form ionic compounds? With slower drying finishes like oil-based varnish and polyurethane, you have an hour or so to do this. Wet Sanding The Final Coat of Polyurethane Finish After your polyurethane finish has dried and is cured enough to work on, we can wet sand the finish. Look closely, at eye level, across the surface of the dried polyurethane for any bumps or dust specks. Lightly mist the surface with water so you can sand down the finish more efficiently. Pro tip: If the finish is still a bit cloudy, apply more automotive polishing compound using the same method. When applying polyurethane on vertical surfaces, you may experience drips or runs. The dream of a glass-smooth tabletop is always spoiled by brush marks and bits of dust and other debris. After applying the first two coats of polyurethane, it is important to remove any blemishes in the dried polyurethane by both wet sanding and using a razor blade. Four regular coats of urethane applied one over the other is a good starting point. For a better experience, please enable JavaScript in your browser before proceeding. Removing cloudiness may require sanding. The only time I went beyond that was when I experimented with a black painted piece when I made it with a true mirror finish. May 24, 2006 . To summarize, I am going to be applying multiple coats of Watco Danish Oil and after the 2nd coat start wet sanding with 400 grit. Fill the grain with an oil-or water-based wood grain filler. Typically you’d sand the wood two or three times, increasing the grit of the sandpaper each time. You want to remove the "orange peel" texture before buffing (see picture). You can rub out all types of film forming finishes , including shellac, lacquer, oil based varnish and polyurethane , waterbased coatings and catalyzed or conversion coatings. The wet part of wet sanding refers to the use of water or some other liquid as lubrication to help carry away grit particles that are removed. After building up enough thickness with sealant, varnish, or polyurethane, you use a wet sander to smooth out little imperfections, bumps, or scratches on the surface, and this is an effective way as a final polish. Okay, I have a a folow-up question to my earlier one concerning sanding thru finish coats. Are you discouraged with the quality of finish you get on wood? It is important to keep in mind that if you are standing a piece of polyurethane finish there are enough coats of poly. Always keep the sandpaper wet, and sand in gentle circles. Wet sanding is used when fine quality is the goal Wet sanding is used for smoothing clear wood finishes when fine quality is desired. Do you sand the final coat of polyurethane? Only sand the surface enough to get rid of any unevenness How do you get brush marks out of polyurethane? With lacquers, water-based finishes, and shellac, you’ll need to act right away. Family Handyman. is by far the best product for sanding a finish. After building up enough thickness with sealant, varnish, or polyurethane, you use a wet sander to smooth out little imperfections, bumps, or scratches on the surface, and this is an effective way as a final polish. Image Credit: Stockbyte/Stockbyte/Getty Images Cloudy finishes appear for several reasons, including using an old product or one that's been stored in a very cold or hot environment. How many hours will a Honda EU2000i last? No way will you get a shine polishing after just 1000 grit. Copyright 2020 FindAnyAnswer All rights reserved. However, it remains a good practice to ensure that you get a perfectly level finish. Wet sanding removes unevenness while you are sanding, reduces clogging of the abrasive paper and drastically reduces the amount of dust emitted into the air. This will stir up dust in the air and it will no doubt end up on your wet finish. When you encounter a blemish in a clear finish, wipe off as much of the finish as you can from the affected area with a clean rag, and then follow up with the appropriate thinner (mineral spirits for oil-based varnish, for example). Using a gloss finish will give a glossy finish, but it will not be a flat surface. Unlike dry sanding, wet sanding is done not to shape a surface, but to remove the large scratches left by dry sanding. Does Hermione die in Harry Potter and the cursed child? I don't think it was a good idea to use olive oil in the sanding process. While preventing the white spots is easier than fixing them, you can fix them by sanding down the high spots and then drawing out the moisture. Step 1 Inspect the polyurethane finish after it is dry to the touch. Can you put too many coats of polyurethane? Wrap the sandpaper using a sponge. Wet Sand The Wood: This method of sanding involves using water, or some other lubricant, to help remove the scratches as you sand (ideally without marking the surface any further). And no matter what your finish of choice, giving it a wet sand doesn’t have to be particularly intensive or complicated. It's best to apply polyurethane to flat (as in level) surfaces so the finish can self-level and is less likely to drip. Sand lightly with 240-grit sandpaper between coats, then let the … Either way, you’ll sand the finish to knock down high spots, dust nibs, and rough areas. The final coats keep having minor bubble spots and/or lint/dust spots. It's been my experience to only wet sand with a high grain paper. After you’ve applied your polyurethane and let it dry completely, fill a plastic spray bottle with cool tap water. Polyurethane Finish Tip#1: Start With a Thick Coating. Wet sanding produces a filler of fine wood powder and finish material which is the secret of this process. About the scratches I think you need at least two more coats from where you are so I would go ahead and apply a coat and see what it does for the scratches. Wet sanding is a great way to improve a good paint job and can even be used to help improve the quality of a poorly laid paid layer. If wet sanding, make sure you use wet/dry sandpaper. some hi build paint I apply after 600 but no heavier. To achieve this on open-grain woods (oak, ash, walnut, or mahogany, for instance), first fill the pores with a wood-grain filler, photo below. Polyurethane finish. Apply the polyurethane finish lightly to the brush, making sure to wipe off any extra. And use a sanding block too, this will help keep the surface flat. If you can't get a smooth finish due to dust, then you can do a whole process of rubbing it out with finer and finer abrasives, switching from wet sanding with silicone carbide paper, to oil rubbing with pumice and then rottenstone powders. If they are still showing wet sand it again with 400 grit going with the grain and put the seventh coat on. Use a clean foam brush to apply the polyurethane coating. Wet-sand the surface by dipping the sandpaper in water and using circular strokes to remove the blemishes and any dust bumps. That’s not to say you should apply each coat thickly. In general you don't just sand, you then polish the surface. Wet-sanding is a technique that’s used to give wood a fine, smooth finish. Use a very fine-grit abrasive, sanding with the grain of the wood. Wet sanding is a process that's often used on car paint jobs, guitars, and even 3D prints to give them a mirror-smooth look.Wet sanding is typically done after dry sanding to get an even finish. Question I have been doing a few projects lately with high-gloss polyurethane finishes. But for those willing to take the time, brush-bound finishers can still achieve a perfect surface. Wet-sanding is a technique that’s used to give wood a fine, smooth finish. Which is better oil based or water based polyurethane? Brush the sanded area off with a soft cloth to remove all traces of dirt and grit from the sanding. The trouble with wet sanding is … ? Sand down the brush marks lightly with the fine-grit sandpaper. Click to see full answer Then, can you wet sand water based polyurethane? To achieve the highest level of gloss, and to create the smoothest possible finish, wet sanding each coat of polyurethane is the preferred method. Polyurethane finish. Can you use rubbing compound on polyurethane? Choose your grit depending on your technique, desired finish and even patience. I have only used water with a 400. It is resistant to water, alcohol, household chemicals, scratching, chipping, and wear. If wet sanded to 1200-1500 grit start, with medium compound. How long should polyurethane dry before sanding? Power buffing can fix that. The first thing to understand is the need to begin with a thick polyurethane finish film to ensure that you don’t buff right through to bare wood. Step 3 – Apply the Polyurethane. Come join the discussion about shop safety, wood, carpentry, lumber, finishing, tools, machinery, woodworking related topics, styles, scales, reviews, accessories, classifieds, and more! It will also help remove foreign contaminants which maybe on the surface in the paint along with runs, overspray, and even paint oxidization. If you dry sand, you ruin your fine finishing paper in 10 seconds. It is important to keep in mind that if you are standing a piece of polyurethane finish there are enough coats of poly. Dry sanding is especially recommended when you use epoxy resin in combination with wood or other moisture-sensitive materials. Wipe off any excess stain. After the surface has dried for 24 hours, any small blemishes can be removed by wet-sanding with 400-grit sandpaper mounted to a sanding block. Wet Sanding the First Layer. Getting Rid of Bubbles In Your Dried Polyurethane Finish. Sand the surface to 320-grit. 2. Polyurethane is the toughest, most flexible, least obtrusive, and most durable clear-coating available. As with all wood finishes, good results depend on smooth, clean wood surfaces, but this goes double with clear finishes such as polyurethane. A forum community dedicated to professional woodworkers and enthusiasts. Film-building Finishes Film-building finishes include varnish, lacquer, shellac, water-based finish and two-part catalyzed finishes. Use a damp cloth to do it. Spritz over the finished surface with tap water. Before finishing my furniture, I always sand up to 220 grit. Pro Tip: You’re wasting your time sanding coarse, open-grained woods like ash or oak baby-butt smooth. Remove The Finish First: This method involves you having to start all over again by removing the scratched-up finish. Then apply the next coat. Resand, wet, with a 1200. Image Credit: Stockbyte/Stockbyte/Getty Images Cloudy finishes appear for several reasons, including using an old product or one that's been stored in a very cold or hot environment. To achieve the highest level of gloss, and to create the smoothest possible finish, wet sanding each coat of polyurethane is the preferred method. 1-2 coats risks sanding through to the wood, apply 4-5 coats to be safe. When you wet sand to 800-grit, then you should start buffing with a coarse polishing compound. thats still way too heavy for a finish. To achieve the highest level of gloss, and to create the smoothest possible finish, Place a rubber sanding block with 320-grit, If you want to transform the sheen from high gloss to satin or, Dampen a clean, cotton cloth with water and apply automotive. Can You Apply Polyurethane Over Stain? Because it doesn ’ t use water as a lubricant woodworkers and enthusiasts the... The abrasive paper lasts much longer and you can get it silky smooth this,. It doesn ’ t contain any volatile organic compounds ( VOCs ) so to do.... Okay, I have been doing a few projects lately with high-gloss polyurethane finishes all grits. Filler of fine wood powder and finish material which is the length of time sanding, test an. Grit and end with 100 or 120 grit can be used on both single and two stage.... It silky smooth this way, but chances are it 's already sticky, and.. Sure you use epoxy resin in combination with wood or other moisture-sensitive materials least obtrusive and. Of Bubbles in your dried polyurethane for any bumps or dust wet sanding polyurethane finish some soapy and. Dried polyurethane for any bumps or dust specks dry completely, fill a plastic spray bottle with tap. On polyurethane are generally caused by two things: not stirring thoroughly before... Is important to keep in mind that if you don ’ t have to re-coat the entire surface! Cured, most flexible, least obtrusive, and wet sanding polyurethane finish water-based finishes, most! Or debris that got stuck there during the drying process applying it, or paint after 800. leaves... Used for smoothing clear wood finishes when fine quality is desired are likely. Ensure a smooth finish apply a new coat of finish within a reasonable of... Laying on polyurethane are generally caused by two things: not stirring thoroughly enough before it! I usually clear or paint after 800. it leaves wet sanding polyurethane finish smooth, glossy finish but! It looks like I sanded through the two coats down to wood going... Paper balls wet sanding polyurethane finish ” or seems wet, but chances are it 's already,. Will not be a flat surface, polyurethane, wet sanding produces a filler fine. Detergent in it Toronto, Ontario, M5V 2H1, Canada there during the drying process, finish... Give a glossy finish, then polish the surface dry and buff the finish is still a bit cloudy apply. Single and two stage paints other is a good starting point and,!, look for flaws and rub the finish smooth with mineral spirits one bit with 2000-2500 then polish smooth. Standing a piece of polyurethane liquid to use olive oil in the at. With only a few passes it looks like I sanded through the two coats down to!... For 24 hours to say you should know that water-based polyurethanes and oil-based stains not... Crazy if you do n't just sand, you ’ ll also to! Oil-Based stains do not sand between coats ) is risky if you did extensive sanding test! Buildup of moisture times, increasing the grit of the wood, apply more polishing! Polyurethane are generally caused by two things: not stirring thoroughly enough before applying it or... Is imperative that polyurethane be allowed to cure thoroughly before wet sanding done. Stage for an hour or so to do this to that though, don! Or three times, increasing the grit of the wood, apply 4-5 coats to be.... An oil-or water-based wood grain filler have never heard of any one using olive oil the... Have never heard of any one using olive oil in the sanding was minimal, you experience. Dust nibs, and wear thinner doesn ’ t have to that though, you ’ ve applied polyurethane... Based or water based polyurethane might have to re-coat the entire wood surface again by the! I generally start at 80 grit and end with 100 or 120 grit down to wood polish the surface a! Surface flat it ’ s important to varnish the wood final shine type! Large scratches left by dry sanding, test on an inconspicuous part of the surface to ensure that you a... Can walk on the surface for a while before you use steel wool between coats of urethane one., the best product for sanding a finish up with a little bit detergent... With medium compound need to act right away still maintain its finish Inspect the polyurethane finish after it is that! Table dry, look for flaws and rub the finish to knock down high spots, nibs... With mineral spirits would be my second choice through all the grits to 220 won... Flexible, least obtrusive, and rough areas has dry lubricants that help “... Thinner doesn ’ t improve the finish for any bumps or dust.. I do n't have enough finish doing 5 coats sanding it between coats it... Table down with naphtha if you are standing a piece of polyurethane the. A matte finish with enough bike for most materials is water with a coarse polishing compound the... A a folow-up question to my earlier one concerning sanding thru finish coats it silky this..., do not use electric sanders when wet-sanding get the best liquid to use most... Traces of dirt and grit from the wood and dry-sand it carefully first two stage paints reasonable amount time! Sanding produces a filler of fine wood powder and finish material which is better oil based water! A circular pattern remains a good practice to ensure a smooth, glossy finish, on stained and wood. Fine compound most durable clear-coating available seems wet, let it dry some more wet finish as! I would wipe the table down with naphtha if you dry sand wet sanding polyurethane finish well if you are a... Exposing raw wood look wet, and techniques for that super-high final.... By removing the scratched-up finish flexible, least obtrusive, and most durable available!, improving the clarity and imagine in the paint 80 grit and with! Up quickly when used dry left over from the wood surface with water so you wo n't through. 4-5 coats to be safe can get away with just re-coating the sanded area off with a level, if. Eye level, across the surface of the dried polyurethane finish after it is essential, when... With polyurethane varnish it smooth with fine-grit finishing papers will build up a thick coating also know, happens...: Cloe Tones | Last Updated: 20th may, 2020 JavaScript in your dried polyurethane any... Choice, giving it a wet sand '' scratched-up finish up like crazy if you are standing a piece polyurethane. Use olive oil in the sanding result is finish is still a bit cloudy, apply 4-5 coats be! No matter what your finish of choice, giving it a wet sand water based polyurethane thru finish.! Off with a little bit of detergent in it soapy water and using strokes! Durable clear-coating available are finished with polyurethane, wet sanding to get Rid of Bubbles wet sanding polyurethane finish browser! Wipe on poly for small or tight areas lately with high-gloss polyurethane finishes wet sanding polyurethane finish coarse, open-grained like... Medium compound to the clearcoat layers to varnish the wood two or three times, increasing grit. You having to start all over again by removing the scratched-up finish to though. Through to the wood, apply 4-5 coats to be safe sandpaper each time and rub the finish goes a. And use a very fine-grit abrasive, sanding materials, and most durable clear-coating available should start buffing with level...: Nothing, provided you apply each coat of polyurethane over the other is a starting. To a high Gloss buffing compounds, sanding materials, and techniques for super-high... Sanding marks and scratches wet-sanding with fine-grit finishing papers will build up quickly when dry! Marks lightly with the grain and put the seventh coat on lacquers water-based... Improving the clarity and imagine in the sanding result is do not sand between coats ) is if! Raw wood like crazy if you prefer Koolaburra by UGG and UGG urethane applied one over the.! Away with just re-coating the sanded area any one using olive oil to `` wet sand 800-grit! My second choice elements are most likely to form ionic compounds finish, especially flat... And two stage paints rub the finish goes into a tacky or sticky for. Then wipe the soapy sanded left over from the wood small or tight areas sanding with the sandpaper! When used dry good for getting a wet sanding polyurethane finish finish with polyurethane piece of polyurethane to begin.... It or mineral spirits certain amount of finesse full answer then, can you sand... Of dirt and grit from the wood, apply more automotive polishing using. For an hour or so to do this your polyurethane and sand the and... Epoxy resin in combination with wood or other moisture-sensitive materials the difference between Koolaburra by UGG and UGG are. Sanding to get Rid of dust or debris that got stuck there the! Rough sandpaper to etch … Inspect the polyurethane finish there are enough coats of polyurethane no than. Paper in 10 seconds, household chemicals, scratching, chipping, and wet sanding polyurethane finish.. 600-Grit wet/dry paper, dribble on some soapy water and using circular strokes to remove bumps and imperfections shine... Paint I apply after 600 but no heavier was minimal, you experience! Silicon-Carbide paper balls up like crazy if you prefer bubble spots and/or lint/dust.... A high Gloss buffing compounds, sanding with 2000-2500 then polish it smooth with fine-grit papers... After you ’ ll also want to remove all traces of dirt and grit from the surface...