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<p>[QUOTE=&quot;cdb1950, post: 49995, member: 1735&quot;]After cleaning, give the coin a final rinse with clean acetone to remove suspended contaminants.&nbsp; I dry with spray duster for electronics or camera parts.&nbsp; It is an inert gas and really seems to work well.&nbsp; Be sure to package your coin immediately after such cleaning.&nbsp; Acetone will remove any protective layer of dirt or oils that might have been protecting the coin from toning.&nbsp; Copper coins, especially.</p><p><br /></p><p>Q-tips work OK for BU and circ coins, but never for proof coins.&nbsp; Even the slightest rubbing with a q-tip can leave hairline scratches on proof fields.&nbsp; These will usually not be noticed on frosty BU or circulated coins, but they might be there as well.[/QUOTE]</p><p><br /></p>

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