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<p>[QUOTE=&quot;jseaman, post: 139147, member: 5538&quot;]What I&#039;ve done was just a quick 15-30 second wash in acetone followed by a rinse in distilled water. Then allow the coins to dry on a soft cotton cloth (old tee shirt). I was preparing proof and brilliant uncirculated coins prior to submitting them for grading and slabbing. The bath and rinse were to insure the removal of any oils from any finger touches the coins might have received. Best to make sure they were clean prior to locking them up in plastic for years.</p><p><br /></p><p>If you are trying to remove something more resistant such as PVC contamination, an overnight soak (or longer) might be appropriate. Just be sure to do it in a covered container or the acetone will all evaporate! </p><p><br /></p><p>You can do more damage with these washes than you will prevent if you are not very careful. As was said, acetone is extremely flammable. BE CAREFUL! Also don&#039;t get it on you - use tongs to dip the coins - be careful of containers - Acetone will eat most plastics.[/QUOTE]</p><p><br /></p>

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