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<p>[QUOTE=&quot;GDJMSP, post: 224243, member: 112&quot;]Howdy John - Welcome to the Forum !!</p><p><br /></p><p>It is usually not a good idea to try cleaning any coin. The only exception to that rule would be to prevent further damage to a coin by leaving a harmful substance on it. Dirt, grime and toning are not harmful substances. </p><p><br /></p><p>But since you mention the color green, there may be reason for some concern - it could be PVC and that is a very harmful substance. However, it could also be toning which is usually a good thing. </p><p><br /></p><p>Can you post pics of the coins so that we may better be able to help ?[/QUOTE]</p><p><br /></p>

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