Birchwood Perma Blue Liquid Gun Blue is the best way 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). Perma Blue will not blue stainless steel, aluminum or non-ferrous metals.
WARNING: To the state of California, this product is known to have chemicals that cause cancer, birth defects, and harm to the reproductive system.
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