Stop in for a cup of coffee

Zinc wont stick to brass or aluminum or pot metal. Great for vac advances I did a prestolight housing for a guy came out really nice and it does not flake off like chrome does. Just have to buff it out after plating it.
Well I'm not sure what type metal the ash tray is?? I'm talking about the piece on the left....this is the one I bought. The other one on the right we're painting
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