Birchwood Casey Perma Blue Liquid Gun Blue

Birchwood Casey Super Blue® Liquid Gun Blue is a double-strength bluing solution designed for bluing highly polished steel parts and hardened steels containing nickel and chrome alloys. Super Blue Extra Strength Gun Blue is the blackest blue.

Used for touching up or completely re-bluing highly polished steel parts and hardened steels containing nickel or chrome alloys. It gives one of the blackest finishes on the market.