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<p>[QUOTE=&quot;Coinchemistry 2012, post: 2110742, member: 28107&quot;]It depends on the method used to AT the coin.&nbsp;&nbsp; Acetone will remove <u>organic</u> contaminants from the surface of a coin and others that are acetone soluble.&nbsp; Not all contaminants or artificial toning are acetone soluble.&nbsp; Acetone insoluble compounds (including many inorganic compounds) cannot be removed by rinsing a coin in acetone.&nbsp; So if the color comes off in acetone, it is definitely AT or debris/haze and not natural toning; however, the fact that it is not removed does not mean that it is NT.[/QUOTE]</p><p><br /></p>

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