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<p>[QUOTE=&quot;The Eidolon, post: 3795077, member: 102103&quot;]I was going to bring up cavitation, but someone beat me to it!&nbsp; Anyway, sonication is probably too rough for coins, and probably doesn&#039;t do much that couldn&#039;t be solved with a simple solvent dip and clean water rinse.&nbsp; The closer the coins are in value to junk silver, the less difference it makes.&nbsp; With enough rough sonication and you&#039;re probably losing some metal as microscopic dust into the solvent bath.[/QUOTE]</p><p><br /></p>

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