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<p>[QUOTE=&quot;differential, post: 8267825, member: 120104&quot;]I think there can be another definition of smoothing, one not implying artificial ways of changing the coin&#039;s surface.</p><p><br /></p><p>Especially for collectors of old copper coins--early American cents, Fugios, colonial coinage, and other types--&quot;smoothing&quot; may refer to the normal wear, usually of lower grades of sharpness AG3-VG8, where there is no corrosion of the coin.</p><p><br /></p><p>Coins not considered &quot;smooth&quot; may have various kinds of corrosion, verdigris being one such kind. &quot;Rough&quot; coins are often corroded coins. There is no way to know if and how the corrosion might continue, although it can be slowed or held in abeyance by a dry and airtight microenvironment, such as coins in an airtight Tupperware with silicon desiccant inside the container.</p><p><br /></p><p>Many collectors may prefer such a lower sharpness grade &quot;smooth&quot; coin to higher level sharpness coins where there is corrosion or even a hint that corrosion may be starting.</p><p><br /></p><p>With such &quot;smooth&quot; coins, one might consider them to have &quot;provenance of American history.&quot; Just imagine how such a coin has been a time-traveler.[/QUOTE]</p><p><br /></p>

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