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Message:: [QUOTE="GDJMSP, post: 25391254, member: 112"]Acetone dissolves and removes 100% of PVC residue 100% of the time. So as I said above, if there was any PVC residue on the coin, it's gone now. As for verdigris, it didn't need to be softened for a little of it to come off on wet Q-tip. A little bit will come off with a dry Q-tip. But that's only because of the nature of verdigris. You could simply touch it with your finger and some of the green would stick to your finger. That's because when verdigris forms there is always a soft, green powder on top, some of which could come off simply by blowing on the coin. It's the hard underlying layers that won't come off. And other than Verdi-Care, there is nothing that will dissolve it and remove it safely. Yes there are other chemicals that will dissolve it and remove it but they will also severely and irreparably damage the coin. People, chemists, scientist tried for 200 years to safely remove verdigris and they could not do so, until Thad came along and invented Verdi-Care. You basically have 2 choices, leave it alone, or use Verdi-Care. And if you do it properly it will not hurt or damage the coin. I know this from personal experience. And that's really about all I can tell you. I will add this, never rub the surface of a coin with anything, not ever.[/QUOTE]