Cold Blue
I have a S&W Airweight 37 that the cylinder and the barrel is more gray than blue. I was thinking I could cold blue the parts, but have had mixed results in the past with cold bluing. What brand do you guys recommend and what procedure do you use in its application?
Oxphoblue - Brownell's
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Sincerely,
Hobie
Heat the part before you apply the cold blue.
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Of the Troops & For the Troops
Heat gun?
Or propane torch?
Cold Blue
I've had good luck with Birchwood Casey's paste. I haven't got a shiny finish, but the paste seems to stick and soak in better. I agree with the heating first. A heat gun works well or even a hair dryer.
Of BC's products, the paste does work best.
Multiple applications is almost a necessity as is a thorough degreasing (which I suspect you already knew).
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Sincerely,
Hobie
i use a torch but a Heat gun should do it.
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Of the Troops & For the Troops
heat gun or boiling h2o you don't want the metal so hot it
boils the cold blue solution. Multiple applications of course, and I have best luck rubbing the cold blue in with 0000 steel wool. the color comes out fully when you oil the part. I have had good luck with both Brownells 44/40 paste and Birchwood casey paste.
Van's. Hands down.
Especially when applied to very warm, thoroughly degreased metal with a saturated 3M green polishing pad. The gently abrasive pad cuts off the oxide coating that forms on the metal surface and allows the bluing solution to penetrate. The more you rub, the deeper the blue.