How to get a gunmetal finish

How to Nitre Blue Gun Metal for a Beautiful Finish | MidwayUSA Gunsmithing

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Bluing Steel Parts Tutorial

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(MOD) Tanfoglio Witness 1911 Full Metal Blowback- Mirror Slide and Black Grip

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Cold Bluing Solutions Test: Super Blue, Oxpho-Blue, Formula 44/40, Oxpho-Blue Crème, Aluminum Black

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Learn Stainless Steel Coloring Techniques on Balustrade, Railings & Post - By AMbros Custom

How to polish my gun slide and barrel