We advise sanding as soon as it’s cured. At 80°F, it will only take 3 hours. Cooler temperatures will mean longer dry times, including 12 hours at 50°F. If it sits for more than 2 days, it can become harder to sand. Although TotalFair is a non-blushing epoxy product, we recommend washing cured TotalFair with water and mild soap before sanding or overcoating.