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Polishing/ buffing float native copper?

Hi. I'm looking to grind and then polish a specimen of float (glacially-tumbled) native copper that I found. Here in the upper peninsula of Michigan locals usually sell finished pieces under the name "butchite." A few high spots on a given piece of float are ground down to remove the green oxidized crust (a result of being buried under top soil for thousands of years) and expose the copper. The copper is then polished and buffed to a mirror-like finish. Does anyone know which grits of sandpaper are used in the process? Is the buffing done on a felt wheel or cloth wheel, and what compound is used? Is a wire wheel used at all? Any insights would be greatly appreciated. Thanks!

Matt

From Matt - February 14, 2011 at 14:03:13
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Message: 69660



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