Sandpaper steps only take 2-3 minutes at the most.” From there, that commenter advised repeating those steps with 1,000-grit and 1,500-grit paper. “You can do this by hand, but a DA [dual ...

Then rinse the dust off, clean it again and let it dry completely. Submerge a sheet or two of 1500-grit wet sandpaper in a bucket of clean water at least a few hours before you do the touch-up work.