If it's been cured under the proper temperature and humidity conditions, TotalBoat TotalFair can form an amine blush on the cured surface. You'll want to remove blush because it can cause coating failure and adhesion problems for primers or paints applied on top of it. To remove blush, just wash the cured TotalFair surface with warm water and a mild soap. Allow to dry completely, sand, remove residue, then apply the desired coating.