Birchwood Casey Super Blue Liquid Gun Blue - 32 oz. Bottle. Super Blue will provide a dark black-blue. Use caution to confine the solution to the area to be reblued as it may have an effect on the existing blue. 3 oz liquid. Technical Information Notes:Used to touch-up or re-blue clean and rust free metal surfaces on firearms. Reacts quicker than blue paste and uses fewer coats. Can be applied with swabs (Q-Tips).Image may not be representative of color or style. Features of Birchwood Casey Super Blue Liquid Gun Blue: Double-strength blueing solution For blueing highly polished steel parts and hardened steels containing nickel and chrome alloys (except stainless) Super Blue Extra Strength Gun Blue is the blackest blue Package Contents: Birchwood Casey Super Blue Liquid Gun Blue Birchwood Casey BC-13432 Super Blue Liquid Gun Blue - 32 oz. Bottle BC-13432