Edit to add: "In the interim ... Long live the use of Acetone in the U.K. ... hey ... its cheap but the real question is can it get past a grading service as never being cleaned or a Spinks cataloger .... for that matter." I'm dumbstruck, of course acetone will get past the TPGCs! Nothing happens, except the coin is decontaminated! What's wrong with everyone, it's not cleaned, acetone cannot clean, only remove grime that may one day attack the coin! Here's my two-penneth, if all perfect coins were decontaminated by acetone, we'd never see a fingerprint upon them ever again. If you get a 100 year old bronze coin in dazzling BU, how long before a 21C careless print makes its appearance? How much do you think the previous seller or auction house cared about handling pre delivery to you? Your prized BU penny from an auction house has just been handled more than a 2010 currency 10p of Elizabeth! It's a shame, but a fact. I think it should be a routine thing that we decontaminate a coin before filing it into our own collections! I do, and always will! All 8 coins from my own collection are sat void of acidic human grease!