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<p>[QUOTE=&quot;GDJMSP, post: 96852, member: 112&quot;]The subject when and how to properly clean a coin has been discussed many times - but perhaps it was before you began to frequent Coin Talk. In any case <a href="http://www.cointalk.org/thread5104-coin-cleaning.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.cointalk.org/thread5104-coin-cleaning.html" rel="nofollow">CLICK HERE</a> for instructions on removing PVC.</p><p><br /></p><p>For removing verdigris you need a chemical called Biox <a href="http://dirtyoldcoins.com/store/product.php?productid=12&amp;cat=2&amp;bestseller" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://dirtyoldcoins.com/store/product.php?productid=12&amp;cat=2&amp;bestseller" rel="nofollow">CLICK HERE</a>. Hope that helps.</p><p><br /></p><p><br /></p><p><br /></p><p>In all likelihood if a coin has green stuff (other than toning) on it then it is due to either PVC or verdigris. And yes it is better to remove the corrosion or it will damage the coin even more. But it will not increase the value - it will only stop it from decreasing even more.[/QUOTE]</p><p><br /></p>

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