The proven way for touching up or completely reblueing most guns
The fast-acting liquid gives a non-streaky, uniform blue-black finish
Birchwood casey® offers you the best ways to touch up scratches and worn spots or even completely reblue 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.