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<p>[QUOTE=&quot;BadThad, post: 2547084, member: 17261&quot;]PVC plasticizer residue contains hydrochloric acid, it&#039;s the acid that causes the damage. Because the coin was exposed so long to the acid, it has etched the surface and created verdigris by further reacting with copper in the coin. Now that you&#039;ve removed the organic residue, you need to remove the verdigris left behind as it is INSOLUBLE in acetone or any other organic solvent.[/QUOTE]</p><p><br /></p>

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