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<p>[QUOTE=&quot;Publius2, post: 7497844, member: 105571&quot;]That someone was me.&nbsp; Here are the links to the results I posted.&nbsp; Note that I set things up to prevent most of the predictable problems.&nbsp; I also ran the coins in the cleaner for much, much longer (6 to 12 minutes) than anyone ever would because I literally wanted to see if I could damage the coins.&nbsp; I did damage the large cent but not the other coins.</p><p><br /></p><p>15 to 30 seconds is about what I would recommend.</p><p><br /></p><p><a href="https://www.cointalk.com/threads/ultrasonic-coin-cleaning-part-2.379239/" class="internalLink ProxyLink" data-proxy-href="https://www.cointalk.com/threads/ultrasonic-coin-cleaning-part-2.379239/">Ultrasonic Coin Cleaning, Part 2 | Coin Talk</a>[/QUOTE]</p><p><br /></p>

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