Birchwood Casey Super Blue Liquid Gun Blue 3 oz

Super Blue™ Liquid Gun Blue

A double-strength blueing solution designed 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. Use caution to confine the solution to the area to be reblued, as it will have an effect on the existing blue.