Butch's Black Powder Bore Shine is a special formula that was developed at the request of blackpowder shooters. This bore shine works just as well as the original, but is designed specifically for blackpowder applications. It removes powder and lead fouling quickly and easily, making quick work of bore cleaning. This special formula dissolves fouling residue and neutralizes the corrosive acids produced by black powder. Butch's Bore Shine is safe for all metals, factory bluing, stainless, nickel, aluminum, polymer frames, rubber and most plastics.