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Message:: [QUOTE="900fine, post: 785324, member: 6036"]That's a vitally important point. This is one reason coin shows are so useful. Go to the show, and bring your cleaned coin. Compare to other coins which slabbed. Also, pick out coins you know are cleaned i.e. ones in "cleaned" slabs like yours. Compare them to "full grade" slabs. Look at many, many coins. Don't be shy. Another useful tip on identifying hairlines - look at proof coins graded PR62 and PR63 or so. Hairlines are one prime reason they are graded that low. They often have no other problems, so the hairlines tend to be very high profile. Often, the problems you see are hairlines and only hairlines, so it's a great way to learn about hairlines. Which means that "hairlines happen" for reasons other than cleaning. Those PR63s aren't cleaned, just hairlined. No doubt you will find a few "full grade" slabs which have cleaned coins (a mistake, obviously, but nobody's perfect). Yes, sometimes a cleaned coin slips by the TPGs . That's one reason Doug strongly encouraged learning to ID cleaning on your own, and not blindly trusting the TPGs.[/QUOTE]