Pettit Prop Coat Barnacle Barrier Aerosol - 20 oz. Pettit Barnacle Barrier provides easy to use aerosol spray protection for bare metals including steel, stainless steel, cast iron, copper, bronze, galvanized steel, and lead. It forms an excellent bond to underwater metals and running gear, and inhibits corrosion on these surfaces. Barnacle Barriers smooth, hard surface will self-clean in service, and can be used above or below the waterline. The dried film of Barnacle Barrier contains the highe