1. 

   GDJMSP Numismatist Moderator

   Oh at one time or another we've had everything suggested from battery acid to cement mixers. And am pretty sure that most of them have actually been tried.
   
   Personally, I've always favored the US Mint's own method of using steel ball bearings and a tumbling machine.

    

   GDJMSP, Jul 30, 2009

   #61 + Quote Reply
2. 

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