BlackShell is a gloss black, rust inhibitive, protective coating and topcoat. It can be used as a stand-alone protective coating that will protect your iron and steel. For the ultimate protection, simply apply BlackShell as a topcoat over the patented Rust Bullet Industrial or Rust Bullet Automotive Formulas to create the strongest armor tough, chip resistant protection against rust and corrosion ever formulated. BlackShell is UV Resistant, scratch and chip resistant, can be brushed, rolled, or sprayed, and dries to a gloss black finish. If used as a stand-alone protective coating, minimum 2 coat application required.