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Cold Blue Touch-up

Discussion in 'Gunsmithing and Repairs' started by MI2600, May 22, 2013.

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  1. MI2600

    MI2600 Member

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    I read through several prior threads on Oxpho-Blue, but didn't see the answer I was looking for.

    While doing small small scratches, etc, how does the Oxpho affect the original bluing?
     
  2. JRH6856

    JRH6856 Member

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    It doesn't really affect the original bluing, but it may not match it either. Nor will it last as long, especially if you are trying to repair holster wear--it will just wear off quicker than the original. If you are trying to repair a scratch, if the metal itself is scratched, it will still be visible as a line unless you buff it out and then you will damage the surrounding finish.

    I have had good luck making Oxpho last a bit longer by heating the spot to be blued with a heat gun before applying the bluing.

    Another option is Dichro-Pan T4 (from Brownells). When applied to hot steel, it will give you a deep blue, almost black.
     
  3. MI2600

    MI2600 Member

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    This is on an older rifle that probably won't see much use. I enjoy keeping them in the best condition I can and keep them deteriorating any further.
     
  4. JRH6856

    JRH6856 Member

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    If the color is blue, try Oxpho as it lasts longer, but if the color is blue-black to black, the Dichro is your best bet. Make sure the surface is thoroughly degreased. Any oil will kill the bluing. Use a heat gun or 1500watt hair dryer to heat the metal as hot as you can. You can get a good blend to the existing blue by wetting a strip of cloth with the Oxpho and buffing like a shoe shine--works really good on barrels and rounded (convex) surfaces. Not so much on flats as it tends to wear the corners.
     
  5. rcmodel

    rcmodel Member in memoriam

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