Birchwood Casey Super Blue Cold Gun Blue 3 oz Liquid

A double-strength bluing 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 re-blued as it may have an effect on the existing blue. 3 oz liquid. Notes:Reacts quicker than blue paste and uses fewer coats. Can be applied with swabs (Q-Tips).