Iosso Gunbrite gun cleaner removes powder fouling, surface rust and discoloration from your gun and leaves behind a protective coating that resists fingerprints and moisture. Safe for all types of finishes.FeaturesRemoves powder fouling, surface rust, tarnish and discoloration from the barrel and stubborn black rings from the face of the cylinder. Leaves behind a non-oily protective coating that resists fingerprinting and moisture. Safe for use on factory blued, stainless steel, chrome and nickel guns.