how long do you let polyurethane cure before wet sanding
Jan 15, 2020 How long does polyurethane spray take to dry? Dries to the touch in 2 hours and can be recoated after 2 hours. Let dry overnight before use. To ensure a smooth finish, sand lightly between coats using 220 grit sandpaper. For maximum durability, a minimum of 3 coats are recommended. May 10, 2020 Apply two to three additional coats of full-strength polyurethane, sanding between each coat. When applying polyurethane, brush along the grain, stretching the polyurethane into as thin a coat as possible. Always allow polyurethane to dry 24 to 48 hours before sanding, to give the surface time to cure and harden.