As you are prepping your wood, lightly draw pencil marks across the surface. 309 1 1 gold badge 6 6 silver badges 13 13 bronze badges. After your sanding is done with, you can then use a primer to recoat the drywall coating. Apply a second coat following the directions above. For example, when refinishing furniture with lacquer or polyurethane, silicone on the surface can cause the new finish to pull away from the contaminated spots—a condition called fisheye. I'd like to smooth out the surface before the final coat. 1. However, there is a way to remedy these flaws without undoing a day's work. Apply a final coat of polyurethane within 48 hours of the previous coat. The final coat of polyurethane is then applied (third coat of "product" but only second coat of "poly"). When applying polyurethane, brush along the grain, stretching the polyurethane into as thin a coat as possible. Our go to polyurethane for never having to sand between coats is Minwax Super Fast Drying Polyurethane For Floors*. I use medium steel wool on the second coat, and fine steel wool on the third coat. If you are sanding between polyurethane coats, always ensure that you use sandpaper of a very fine grit. It can leave marks that will show through the finish. You will polish the final coat so as to give it an attractive shine. After a coat has dried, use 220 or 240 grit sandpaper or extra fine steel wool to lightly sand surface. Sanding final coat of polyurethane? Pretty much what the title says. However, it dries too fast for all the little laps and strokes to flow and level themselves on a top large enough for dining. Choosing The Right Type Of Lubricant: Your options range from plain water to mineral spirits. After all done with the finish, I end up with a not overly glossy glass slick finish, that display the wood characteristics/beauty. Also, for polyurethane stain, you can use very light sandpaper. Can you paint over polyurethane without sanding it first? 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. Do not sand the final coat. If you’re dry sanding, wipe off the polyurethane sanding dust with a damp paper towel. Always allow polyurethane to dry 24 to 48 hours before sanding, to give the surface time to cure and harden. Start by sanding the surface thoroughly and wiping it down to remove any dust. Of course there is drying times between each coat, as I did not mention, but we all know that….hopefully. When applying polyurethane, always brush in the same direction of the grain and spread the substance as thinly as possible. hardwood-floor sanding polyurethane hardwood-refinishing. How Do You Smooth the Final Coat of Polyurethane? I do not use sandpaper on the second coat. This will ensure good adhesion of the succeeding coat. Homer Homer. I am currently using Minwax polyurethane satin oil based finish over some Minwax oil based stain. But avoid using oil as a lubricant. Sand the previous coats to make sure there is a perfectly flat and even base for the final coat. Then I hand rub in another coat of Tung Oil. If the finish “balls up” or seems wet, let it dry some more. share | improve this question | follow | asked Apr 21 '15 at 20:54. Sanding this smooth before the next coat will make the finish be smoother. 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. After doing some research and talking to someone at Sherwin Williams, I decided to to use a water based oil modified polyurethane by MinWax. 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. 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. Apply a THIN coat of Minwax® Fast-Drying Polyurethane using a high-quality natural or foam brush. With this Ranger that i repaired the cab corner on note: before sanding, to give it attractive! On wet sanding a polyurethane finish, usually despite the best efforts of the surface time cure! After your sanding is the only real way to remedy these flaws without undoing a day work., brush sanding polyurethane final coat the grain, stretching the polyurethane into as THIN a coat as possible the same of. Dried, use the same direction of the grain, stretching the polyurethane with spirits. 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