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<p>[QUOTE=&quot;Owle, post: 1174353, member: 22004&quot;]I&#039;d bring the coin to a coin show and get some expert opinions.&nbsp; The main thing to avoid in any way, shape or form is contacting the surface with cloth or any abrasive.&nbsp; Running water over the surface of a coin will not abrade it.&nbsp; Acetone is available at hardware stores and may be useful removing things that water will not--but again, any abrasive contact to the surface may damage it.&nbsp; Nail polish remover has acetone, but also other problem chemicals.&nbsp; </p><p>&nbsp;</p><p>NCS charges a percentage of the value of the coin or a minimum.&nbsp; They called me once on a submission with copper spots that they removed cheap.&nbsp; Sure beats using strychnine which some people use.[/QUOTE]</p><p><br /></p>

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