The cream is safe to use as a gun cleaner or knife polish, as it is non-abrasive, non-toxic, and non-flammable. A should-be-staple of all firearm cleaning kits, has great ability to polish, deoxidize and protect nearly all metal surfaces. This includes factory bluing on your gun, stainless steel, chrome, aluminum, and even painted surfaces, fiberglass and synthetic materials. It removes rust, water stains, heat discoloration, lead and powder residue, oil, and fingerprints. 1.76 oz