Birchwood Casey Perma Blue® Paste Gun Blue, offers you the best ways to touch up scratches and worn spots or even completely re-blue most guns. It will give a non-streaky, even blue-black finish to steel (except stainless). Both Perma Blue® liquid gun blue and paste gun blue provide great blueing to metal that has already been thoroughly cleaned and is free of rust.

Perma Blue® paste gun blue is slower to darken than liquid gun blue, but will build up a denser finish.

NOTE: Perma Blue® liquid gun blue will not blue stainless steel, aluminum or non-ferrous metals.