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<p>[QUOTE=&quot;Randy Abercrombie, post: 25443967, member: 92655&quot;]It takes handling a lot of coins. And I&#039;ll be honest... I bought two coins last year and sent them in for slabbing and they came back cleaned and I been collecting for fifty years... It isn&#039;t always apparent. And to further confound the issue, cleaning coins was a typical numismatic practice in the 19th century so the coins that were cleaned by our forefathers are generally regarded as &quot;market acceptable&quot;. </p><p><br /></p><p>You are correct to look for cartwheeling. This is created by the movement of metal during the striking process. It is easy to see when you take a newly minted quarter and turn it around out in the sunlight. Cartwheeling tends to disappear when a coin is circulated or harshly cleaned. The best description I have seen is in a book published by one of our members [USER=19165]@physics-fan3.14[/USER] called The Art And Science of Grading Coins. A necessary read if you stay in the hobby.</p><p><br /></p><p>Coins can be cleaned correctly (my avatar coin), but for the most part if you can see rubbing marks on the surface viewing thru a small loupe, this would be considered harsh or unacceptable cleaning.[/QUOTE]</p><p><br /></p>

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