In case you are using oil-based polyurethane, please give it up to 24 hours of drying time before sanding and applying the subsequent coat. But if you have let the finish dry for more than 12 hours, sand the finish lightly with 220 grit sandpaper. Step 5 Allow the polyurethane coating to dry for 24 hours. If any blemishes or bumps are still seen, use the same sanding process to remove them. If this timing is followed, no sanding between coats is needed! Use a clean foam brush to apply the polyurethane coating. Wipe off polyurethane dust with a soft cloth, then wipe with a tack cloth, and begin applying second coat. My first problem is getting an even coat. Just don't finish your work outdoors, where you can't control dust, bugs, and other flying finish-ruiners. Benefits of Polyurethane If the sanding was minimal, you can get away with just re-coating the sanded area. Apply a new coat of polyurethane over the area you sanded. Polyurethane takes hours, not minutes, to dry; that's a lot of time for dust to settle or bugs to land on the surface, marring the final product. At this point you’re ready to either move on to a coat or 2 of wipe on poly, or you can skip that and start rubbing out the finish you want, which is covered below as well. Sanding this smooth before the next coat will make the finish be smoother. A poor sanding job will never look right no matter how much product you apply. This will ensure good adhesion of the succeeding coat. You don’t have to sand between coats of poly as long as you get the next coat on within 12 hours – which means yes, sometimes you will be up at really strange hours coating yours floors with poly and your neighbors may wonder if you’re up to no good. I do not use sandpaper on the second coat. I am currently using Minwax polyurethane satin oil based finish over some Minwax oil based stain. It can leave marks that will show through the finish. hardwood-floor sanding polyurethane hardwood-refinishing. Follow up with 2 coats of undiluted polyurethane straight from the can. A coat of polyurethane dries slowly, allowing dust to settle and requiring 24-48 hours between coats. And the final layer won’t need any sanding at all (provided that it’s been spread on evenly). Also, for polyurethane stain, you can use very light sandpaper. After your sanding is done with, you can then use a primer to recoat the drywall coating. After doing some research and talking to someone at Sherwin Williams, I decided to to use a water based oil modified polyurethane by MinWax. Apply a final coat of polyurethane within 48 hours of the previous coat. Using The Right Type Of Sandpaper: Wet sandpaper differs from dry sandpaper in that it does not fall apart when wet. Polyurethane Stain. You will polish the final coat so as to give it an attractive shine. The final coat of polyurethane is then applied (third coat of "product" but only second coat of "poly"). If you did extensive sanding, you might have to re-coat the entire wood surface with polyurethane. I put on a final coat of water based polyurethane on some wood. Choose the method that best works for you as you can brush, roll, or wipe. So we “rub out” the final coat to make it smooth and flat. Our go to polyurethane for never having to sand between coats is Minwax Super Fast Drying Polyurethane For Floors*. Do not sand the final coat. Each subsequent coat won’t need as much sanding work as the very first layer. How do I apply a second coat of polyurethane? Applying a coat of deglosser, also known as liquid sandpaper, can work in much the same way as sandpaper but without the need for all the sweat. If you are sanding between polyurethane coats, always ensure that you use sandpaper of a very fine grit. Hi, I recently bought a Gerton Ikea desk top which I found out after was unfinished, and jumped through some hoops to get it so I decided I would try to finish it myself, even though I am in a small apartment. I like to keep things easy, and efficient. Read Also: How to Sand Table Legs-In 7 Effective Ways [Like a Pro] Apply a primer to recoat the drywall coating=> Check on Amazon=> What do you do after you apply the final coat of polyurethane to smooth out the imperfections? I will know when it's enough by feel, I'll run my hands over the piece checking for 'rough' spots. Pencil Marks. However, it dries too fast for all the little laps and strokes to flow and level themselves on a top large enough for dining. Pretty much what the title says. Always allow polyurethane to dry 24 to 48 hours before sanding, to give the surface time to cure and harden. Issue sanding between coats of polyurethane. Of course there is drying times between each coat, as I did not mention, but we all know that….hopefully. Apply two to three additional coats of full-strength polyurethane, sanding between each coat. When using water or oil based poly, how do you buff out the last coat? Do not sand the final coat. I used a gel stain for color and then I have applied 3 coats of Varathane polyurethane with a satin finish. Again wait for the primer to dry to give the coat another sanding. Homer Homer. Sanding removes the lines and ridges created by the … Sand the surface once more, then apply your final clear coat. After a coat has dried, use 220 or 240 grit sandpaper or extra fine steel wool to lightly sand surface. But avoid using oil as a lubricant. Then I'll hand rub in a third coat of tung oil. Sanding final coat of polyurethane? Sand the previous coats to make sure there is a perfectly flat and even base for the final coat. Semi-gloss products can differ in appearance depending on species of wood, sanding grit used and what sealer was used and if stain was applied. Do not sand final polyurethane coat. How Do You Smooth the Final Coat of Polyurethane? In this case, applying a thin sealer coat of shellac (which isn't affected by silicone) separates the silicone contaminant from the topcoats. I'd like to smooth out the surface before the final coat. 1. Choosing The Right Type Of Lubricant: Your options range from plain water to mineral spirits. For a better finish and perfect bonding between two layers of stain, the answer is yes. Sanding Between Coats of Polyurethane. I tend to use very fine sandpaper when doing the in between coat sandings. That’s because oil-based stain gives us enough time to wipe off the extra amount of stain with a rag easily. share | improve this question | follow | asked Apr 21 '15 at 20:54. I prep sanded the wood using 80 grit and worked up to 220 grit. Both water-based and oil-based products give off strong fumes as they dry (although oil-based is decidedly worse), so proper ventilation is a must. After drying, sand first coat lightly with 220 paper on a sanding block. I just put on my 4th coat and despite meticulously sanding any bump and imperfections between each coats, a good amount of little lumps appear on each coat. To the touch, it actually feels smooth (maybe i cleaned the dust up well between coats?). I believe it's either bubbles or dust. Can you paint over polyurethane without sanding it first? The biggest problem you can have is if your sandpaper is too rough. Brush marks often show up on pieces of furniture treated with polyurethane finish, usually despite the best efforts of the craftsman. Apply a second coat following the directions above. So I sand that last coat, right? This is a routine application. Here you can find the full steps of how to apply polyurethane to your wood. Getting Rid of Bubbles In Your Dried Polyurethane Finish. When applying polyurethane, always brush in the same direction of the grain and spread the substance as thinly as possible. Allow 3-4 hours dry time before you sand. After final coat, allow 24 hours before normal use. This is not mandatory for oil-based stain. Starting first with this Ranger that I repaired the cab corner on. You can apply a second coat of polyurethane around 15 to 30 minutes after application. For surfaces such as the floor, you can apply up to 3 layers. Two axioms for furniture finishers are that you shouldn't shake the can before applying polyurethane and you shouldn't wipe the brush along the side of the can. That will show through the finish, but will disappear as you apply last coat any blemishes bumps. That may be felt for never having to sand between coats is Minwax Super Fast polyurethane... Based finish over some Minwax oil based finish over some Minwax oil based,! 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