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<p>[QUOTE=&quot;Colonialjohn, post: 5394503, member: 57741&quot;]I developed a cleaning process over the last 40 years but my posts normally get killed as the Moderator suspects self-promotion. Contact me privately and I will give you my two criteria for ultrasonic cleaning remembering tough soils over sensitive surfaces epecially for bronze alloy pieces. I do not collect ancients other than helping my daughter purchase greek coins when we meet at the NYITL and when I recently was in Israel - Jewish Revolt pieces. In some ways its complex as I had to weed out what worked and did not work. It helped I was an R&amp;D chemist for awhile in Industrial Cleaners and I have M.S. in Chemistry. BTW the current VerdiCare is garbage, the current Coin Care is perfumed nonsense and all others are copper brightness imposing hairlines ... OH NO ... here comes the AX! LOL</p><p><br /></p><p>John Lorenzo</p><p>Numismatist</p><p>United States[/QUOTE]</p><p><br /></p>

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