Over 40 Years Experience Applying Advanced Firearm Coatings


Salt Blue: Salt blueing (also known as hot blue, caustic blue or black oxide), is a process where properly prepared steel parts are suspended in a boiling bath of salts. The oxidation that forms on the surface of the steel is known as blueing and acts as a medium for oil to penetrate and prevent rust. The color of the blue will be a shade of black (from flat black to glossy black) depending on the degree of polish. Craftguard makes our own blueing salts solution. All polishes are available. Finish protected with Birchwood Casey’s “Sheath”. Meets military specifications Mil-C-13924C.