A double-strength blueing solution designed for highly polished steel parts and hardened steel containing nickel and chrome alloys. 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.