Eastwood Powder Coating Powder Zinc Rich PrimerEastwood Powder Coat Zinc Rich Primer 1 LB bag EW16058 Helps color powder coats bond to the part being coated. While all Eastwood Powder Coats can be applied directly to a bare metal surface without the use of a primer, certain projects demand increased corrosion protection. If your parts will be exposed to a corrosive marine environment or will spend time exclusively outdoors in harsh weather, Eastwood recommends using Zinc Rich Primer before the top