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<p>[QUOTE=&quot;SuperDave, post: 2753934, member: 1892&quot;]Because the acetone removed what was covering those smudges. They are likely permanent damage from PVC.</p><p><br /></p><p>Acetone is chemically incapable of altering the appearance of a coin, excepting in rare cases with copper where you have to <b>work</b> to get the conditions right. Think, performing the dip in your yard, in bright sunlight on the most humid day of the year, in a glass which is wet with rinse water, and allowing the acetone to evaporate. Conditions like that.[/QUOTE]</p><p><br /></p>

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