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Message:: [QUOTE="Gavin Richardson, post: 2995772, member: 83956"][ATTACH=full]740100[/ATTACH] Actually, I want to know how I should clean my crocodile. I finally got one of those COL NEM coins and am very pleased with the reverse detail for the price point. It's dark and glossy, so a bit hard to photograph. Above is the same coin photographed with my cell phone in different forms of light. Unless I buy an "uncleaned" or semi-cleaned lot, I don't try to improve a purchased coin; typically, in the tray it goes. But I think this reverse can be improved. There seems to be some gunk under the croc's belly and around his eye and in the chain. I'd like to see if I could get a cleaner reverse. I am deathly afraid of soaking a somewhat pricey coin. I did that years ago to an Agrippa/Neptune coin to treat it for bronze disease and ruined the patina. I'd rather just stay mechanical for this coin. I had thought about getting some nylon brushes for my Dremel and having a go at it. I am assuming that nylon bristles would be soft enough to not affect the patina, but I may be mistaken here. And don't worry--if there's a serious chance of making this coin worse, I won't touch it. I am Hippocrates when it comes to ancients: FIRST, DO NO HARM. So, CT friends. Can this reverse be improved? Would nylon bristles in a Dremel rotary tool be a fairly safe step? Or should I pop it in the tray and not risk offending the Sacrae Monetae?[/QUOTE]