Suitable for bare, sanded and unsanded surfaces. Cannot be retouched with polyester materials. Can also be used on old paint coatings as a sealer. Welding test certificate - repels welding beads.
Product is great. Think of this as a 3 in 1 primer. A weld through primer, a rust protectant, and a self etching adhesion promoter. Can uses a wide fan pattern spray nozzle for good even coverage. Best product I have found for the install of new sheet metal on cars and trucks.