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Message:: [QUOTE="GDJMSP, post: 2746477, member: 112"]There's a whole bunch of stuff/questions involved in what you just said. In the freezer with distilled water ? That's a new one on me. And while others will disagree, acetone on copper isn't always a good idea. Now as a general rule graders won't touch a coin, as in cleaning it, sent to them. Unless you specifically send it in to be cleaned by them, ask them to do it and pay them to do so. But it has been known to happen without permission from the owner, though most TPGs will deny that it does. As to what they do, specifically, to clean the coins, they won't ever tell you. But there's only so much one can do, and most of the options are pretty well known. And Verdi-Care - its one and only use to remove verdigris. So unless your coin has verdigris on it, don't bother. Will it lower the value if you do ? Depends on who you ask. Verdi-Care is a good product and it does what it's supposed to do, but it does leave traces (material) on the coin. Some people won't care about that, others will. And the TPGs claim they can detect it with their "sniffer". And if they do, they will not slab the coin. But, if they don't use the sniffer, and they won't unless you pay them to do so, then the coin may well be slabbed and straight graded. Of course if it has other problems or issues it won't be.[/QUOTE]