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<p>[QUOTE=&quot;Cloudsweeper99, post: 106966, member: 3011&quot;]However, in the interest of human advancement, it might be worth the time to find a few common cents with similar problems and perform some experimental cleaning.&nbsp; Just as an uncirculated coin that has been circulated but shows no sign of wear is still uncirculated, a cleaned coin that shows no sign of cleaning is still an uncleaned coin. [Hint: acid probably isn&#039;t the solution and I don&#039;t know what is or I&#039;d be doing it myself].</p><p><br /></p><p>If you manage to do this successfully so that it can&#039;t be detected even under magnification, remember to call it &quot;conservation&quot; and not cleaning.</p><p><br /></p><p>This is the Holy Grail of numismatics and you might become famous, rich, or both if you can do it.&nbsp; Expect it to be difficult and require an unconventional approach unlikely to have been attempted by others.[/QUOTE]</p><p><br /></p>

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