Birchwood Casey Perma Blue Liquid

Birchwood Casey perma blue gun liquid will touch up scratches and worn spots or even completely reblue most guns. It gives 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.