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<p>[QUOTE=&quot;ranchhand, post: 159895, member: 2622&quot;]I am not a copper man, but i beleive this is &quot;verdigris&quot; and very harmful to coins, it can corrode the coin and needs to be removed. I am sure that others will post on how to remove it, or you can do a google search.</p><p><br /></p><p>it may be possible that the &quot;dot&quot; is corrosion...</p><p><br /></p><p>here are some links i dug up, as to their validity i defer to others on this site with more experience:</p><p><a href="http://reviews.ebay.co.uk/HOW-TO-REMOVE-VERDIGRIS-GREEN-SPOTS-FROM-COPPER-COINS_W0QQugidZ10000000001234515" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://reviews.ebay.co.uk/HOW-TO-REMOVE-VERDIGRIS-GREEN-SPOTS-FROM-COPPER-COINS_W0QQugidZ10000000001234515" rel="nofollow">http://reviews.ebay.co.uk/HOW-TO-REMOVE-VERDIGRIS-GREEN-SPOTS-FROM-COPPER-COINS_W0QQugidZ10000000001234515</a></p><p><a href="http://www.dirtyoldcoins.com/store/search.php?mode=search" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.dirtyoldcoins.com/store/search.php?mode=search" rel="nofollow">http://www.dirtyoldcoins.com/store/search.php?mode=search</a>[/QUOTE]</p><p><br /></p>

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