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<p>[QUOTE=&quot;John Anthony, post: 2128419, member: 42773&quot;]I don&#039;t think it&#039;s fair to compare the conservation of ancient and modern coins. US coins, by comparison to the coins I collect, are ALL brand-spanking new, even the ones dated 1793. They have not accrued the effects of time that 2000-year-old coins have. Since you&#039;re an archaeologist, I don&#039;t have to tell you that most ancient coins MUST be cleaned, unless you like collecting unidentifiable clumps of dirt.</p><p><br /></p><p>Uncleaned, or properly restored US coins have a certain &quot;skin&quot; to them, a luster and/or color that is easily stripped by harsh cleaning. Over-dipping coins can leave them with a very lifeless, drab appearance. Whizzing will make them look shiny from a distance, but on closer inspection, you&#039;ll see that the surfaces of the coin are destroyed.</p><p><br /></p><p>But as other posters have attested, TPG&#039;s frequently give grades to coins that have been properly conserved. We&#039;re not really discussing the virtues of cleaned-versus-uncleaned here, as much as what is and what isn&#039;t proper conservation.[/QUOTE]</p><p><br /></p>

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