Zinc Rich Primer Powder Coating Paint 1 LB Zinc Rich Primer Powder Coating Powder (1 pound) Epoxy Cure Schedule: 392F for 2-3 minutes as the part starts to gel. Then remove the parts and apply your next coat and FULLY cure according to the specifications for the given top coat. Salt Spray Results: 3,000 + Hours + $1.00/item shipping for all of our products!