A: Jack, Rinsing is not required — Klean-Strip® Easy Liquid Sander Deglosser should be left on the surface and allowed to dry for ten minutes. The surface can then be painted.
Accordingly, how long do you leave liquid sandpaper on?
Let the liquid sandpaper sit on the surface for the time designated by the instructions (about 10-15 minutes). Wipe off the surface with another lint-free cloth to remove any residue left.