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Old 30th Nov 2019, 10:14 am   #4
ajgriff
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Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 2,583
Default Re: Black oxide coating

Brine, chlorine bleach fumes and vinegar all discolour solid brass to varying degrees. Might be worth experimenting with with one or two small unloved pieces in the first instance.

Alan
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