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Artist wants black surface for sterling

I'm a metal artist and I need to come up with a black surface on some sterling silver parts, that won't wear off. I've tried heat treating and chemical oxidizing solutions. I've been working with enamel and paints that are fired in a kiln at 1500 F, but it's not producing the results I'm looking for. Is there an black electroplating process that will hold up to friction; the parts rub against each other.

Is there a clear, non yellowing protective coating for sterling silver? One that will hold up to friction wear and not scratch off? I've tried all the Krylon clear sprays, but I need something clear that will really stick to bare metal.

Cheryl Rydmark
metal artist - Mendocino, CA USA
December 19, 2009

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