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<p>[QUOTE=&quot;GDJMSP, post: 24580405, member: 112&quot;]Bryan, from what you are describing it sounds like the coins are covered with verdigris. If it&#039;s green/greenish in color, that&#039;s almost certainly what it is. Verdigris is to copper what rust is to steel - in other words verdigris is the result of copper corroding. It is literally what the copper metal turns into when it corrodes.</p><p><br /></p><p>There is one and only one product that will remove it safely - Verdi-Care.</p><p><br /></p><p><a href="https://www.wizardcoinsupply.com/products/verdi-care.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.wizardcoinsupply.com/products/verdi-care.html" rel="nofollow">https://www.wizardcoinsupply.com/products/verdi-care.html</a></p><p><br /></p><p>Unfortunately for you 20 pounds is a lot of coins, a whole lot of coins. And the bottles that Verdi-Care comes in are pretty small. So you have 3 problems; 1 - the expense; 2 - being able to get enough of it; and 3 - even you could get enough, when coins are covered like you describe you&#039;ll have limited success getting it off. The man, BadThad, who invented it and sells it, is a member of this forum, and that&#039;s what he himself says.</p><p><br /></p><p>Verdi-Care works quite well when trying to remove isolated areas of verdigris from coins but not so much when the coins are covered with it. But you can sure get a bottle and give it a try.[/QUOTE]</p><p><br /></p>

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