Can you sand epoxy?
Wet sanding with waterproof sandpaper is often the best approach to sanding cured epoxy. Cured epoxy is difficult to sand because of its hardness. In fact, cured epoxy is just softer than plastic laminate such as Formica® At 70°F, WEST SYSTEM® epoxy cures to 90% of maximum physical properties within 24 hours. Oct 7, 2014