Need to stop corrosion and want a primer-like coating that can be applied over rusted metal or on bare metal? You found the best metal rust and corrosion protection products you can buy. POR-15 3-Step Stop Rust Protection System is designed to permanently seal and prevent moisture, salt, or other contaminating krud from contacting metal surfaces. This is the system most trusted by award-winning automotive restoration professionals, off-roading enthusiasts, farming and industrial equipment repair services. You'll be amazed at the toughness!