I am using Caswell's black chromate on small parts.You need to zinc
plate the part first. The research I have done on gun blueing show
there is a hot and cold process. The cold blueing is not very
durable. I have not found any hot blueing kits and the process is
very toxic compared to the cold process. Black chromate is very toxic too.
John
At 03:54 PM 12/31/2010 +0800, Alan Seigrist wrote:
>All -
>
>Just curious, how do you all restore the black finish found on many of the
>British car tools. It's quite similar to gun blue, but it's a little
>different. Would love to hear your thoughts.
>
>Alan
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