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<p>[QUOTE=&quot;Oldhoopster, post: 2713686, member: 84179&quot;]In over 45 years of collecting, I have found that cleaning coins is usually a bad idea.&nbsp; Removing PVC or other organics with acetone is fine, since it protects the coin by removing the acidic residue and doesn&#039;t affect the surface of the coin. </p><p><br /></p><p>I would not try to remove toning, unless you like the unnatural, shiny finish.&nbsp; Dips actually remove metal from the surface along with the toning.&nbsp; And using something like baking soda or polishing compound is equivalent to washing your car with fine grit sandpaper.</p><p><br /></p><p>In rare instances, it can help, such as metal detector finds or coins that have been buried for a long time (I used to buy uncleaned ancients and soak them until I could see enough to ID).&nbsp; As Alurid mentioned, someday someone is going to try to sell them and will be very disappointed when they are told that a valuable coin is only worth a fraction due to cleaning.&nbsp; Just my opinion.[/QUOTE]</p><p><br /></p>

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