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<p>[QUOTE=&quot;desertgem, post: 878954, member: 15199&quot;]Probably 10% or more of the forum knows how to, but few would admit it, and even very fewer would detail how it is done. The reason is that some people will hold that the person admitting or describing such a process of AT is a coin doctor, and every toned coin he offers will be construed to be AT. Anyone with even a slight chemistry background could figure it out and do it if they wished. As has been pointed out, no one can tell the difference between a NT coin and a Very good AT coin. Most of the colloquialisms ( even in the TPG&#039;s grading guide) as how to tell AT is only good for poor AT jobs. But if it is market acceptable, it is market acceptable as NT, is it not? Until someone invents a &quot;way-back&quot; machine to see if the coin underwent &quot;evil&quot; intent to accelerate the chemical process, we will be left with uncertainty. </p><p><br /></p><p>I am sure that the best coin doctors are happy with the fact that so many can think they can tell any AT/NT coin with confidence.[/QUOTE]</p><p><br /></p>

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