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<p>[QUOTE=&quot;UTC, post: 930388, member: 26203&quot;]Thanks for the answers.</p><p>&nbsp;</p><p>The reason I wanted to work on this coin was that there was a lot of yellow and brown on the coin that looks like stain or &quot;rust&quot;, which made the coin quite unpleasant to look at.</p><p>&nbsp;</p><p>So, is the brown and yellow stain actually natural toning? Or was it some sort of chemical reaction on the coin caused by alien material that Acetone cannot remove?</p><p>&nbsp;</p><p>Please let me know more. Thanks.[/QUOTE]</p><p><br /></p>

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