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<p>[QUOTE=&quot;-jeffB, post: 24612972, member: 27832&quot;]It&#039;s unlikely to do anything. That looks like terminal toning, which is a black layer of silver sulfide, which won&#039;t come off without dipping (or electrolysis, or a grinding wheel). The surfaces underneath the black areas probably won&#039;t look right, because toning that dark is <i>thick</i> enough to disrupt luster.</p><p><br /></p><p>On the other hand, acetone can&#039;t <i>hurt</i> anything (as long as you don&#039;t get it on the plastic!), and if that black stuff <i>isn&#039;t</i> toning acetone might take it off. But it looks like toning to me.[/QUOTE]</p><p><br /></p>

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