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.
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).