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<p>[QUOTE=&quot;desertgem, post: 1099908, member: 15199&quot;]Doug is correct. From a few snippets in some of his post,I think he has a good knowledge of toning, both AT and NT. But most people are afraid to let their knowledge on this area be known due to the paranoia rants which probably could come from many. Very few master AT use any liquids or solid anymore. It is my suspicion that they use gaseous methods which can be controlled by devices similar to the medical&nbsp; computerized IV controller. Inert gases can be used to flush or dilute gases to provide slow even toning. Most likely these set ups could be multiplexed together to do many at one time. Anyone with chemical or controller experience could easily whip something up. When people can mint 1964-D peace dollars with seeming immunity from the numismatic community, why worry about AT, except of course it is a financial consideration. AIMHO, as I don&#039;t know for sure, and would not tell details if I knew.[/QUOTE]</p><p><br /></p>

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