Birchwood Casey Perma Blue Liquid Gun Blue 3 ozs.

Birchwood Casey Perma Blue Liquid Gun Blue. The proven way to touch-up scratches and worn spots! Great for completely re-bluing most guns, too! Give a non-streaky, even blue-black finish to steel (except stainless).All parts to be blued must be thoroughly cleaned with a metal cleaner first and any rust must be removed before applying Perma Blue.