Re: Black oxide coating on brass
No, the blue or black surface coating on guns is produced by a chemical conversion process. I recall being in the USA many years ago and roaming through the sporting goods section of a Wallmart and they had had kits on sale for DIY bluing/blacking. I think they used a solution with cyanide in it, so they may have been withdrawn by now
In my experience, these processes are often something of a "Black art", and even if you have a written procedure from a reliable source, and you can acquire the chemicals, you'd be lucky to get a good result first time. There's usually a learning curve. People I know who are air rifle enthusiasts generally send them away to specialists for blacking when they do a rebuild.
B
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