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<p>[QUOTE=&quot;gxseries, post: 1524565, member: 4373&quot;]It&#039;s definitely extra virgin olive oil if you are wondering. I don&#039;t have the brand handy but it&#039;s definitely the case as I only buy extra virgin. Some would debate why clean coins but I would prefer to call it &quot;preserving&quot; as if you let copper coins sit as it is, the verdigris will eat the coin up over time. </p><p><br /></p><p>As some have suspected, it could be the case of artificial patina. I had another coin using the same batch of olive oil and it turned out to be ok. </p><p><br /></p><p>This is another example</p><p><br /></p><p><img src="http://www.omnicoin.com/coins/1011497.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>This turned out to be ok, didn&#039;t it? It was full of verdigris on one side as you could tell from the pit marks. </p><p><br /></p><p>Nevertheless, an interesting lesson learned. Least I know that this coin isn&#039;t full of verdigris damage which would have happened if I let it sit over many years.[/QUOTE]</p><p><br /></p>

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