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Brazing on gun won't darken to match the iron barrel

2007

Hi
I weld a part of my gun barrel with brass and I oxidize the barrel, but the brass doesn't turn black. Is there any way to oxidize the brass? if possible a formula to turn black brass and iron to a consistent color in the entire barrel?

Thanks very much

Hilario Luz
gunsmith - Azeitão, Setubal, Portugal

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Oil your object very, very slightly and then heat it slowly to max.400 C.According to old books linseed oil [affil links] is best but you can use any edible oil or fat,or even 20% shellac solution(first try that process on some iron scrap!).Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia
2007

I have done this with olive oil on an aluminum pistol frame. It actually bakes the oil and leaves a hard black coating. Make sure you have plenty of ventilation, it sure does stink.

Ed Kay
- St. Louis, Missouri, USA
2007