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<p>[QUOTE=&quot;Insider, post: 2396069, member: 24314&quot;]Most AT on coins is done with chemicals.&nbsp; Some react VERY QUICKLY.&nbsp; Just about every popular method/chemical used to PUT COLOR ON METAL is in books.&nbsp; &quot;Trade Secrets and ...&quot; is a good example.&nbsp; Ever hear of arsenic?&nbsp; Wonder how many folks got sick coloring metal in the past?[/QUOTE]</p><p><br /></p>

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