Hot Rod Sparkle Colors recreate the popular ?retro? feel of automobiles of the 1950?s and 1960?s. Hot Rod Sparkle Colors create a brilliant, powerful glitter-like effect that truly shimmers Colors are best used over Auto Air Base Coat Sealer Dark or Auto Air 4200 Series Deep Black Graphic Colors Apply 1-2 light coats of Auto Air Base Coat Sealer Dark and 2-4 light coats of Hot Rod Sparkle Colors.