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<p>[QUOTE=&quot;GDJMSP, post: 8171831, member: 112&quot;]Indeed it is. In point of fact I used to have very rich folks pay me a whole lot of money to make the very expensive copper roofs on their multi-million dollar houses I was building for them - turn green ! But - when copper turns green, including the copper pipes you were talking about, and those expensive copper roofs - it&#039;s all verdigris.</p><p><br /></p><p><br /></p><p><br /></p><p>The answer is found in the link I posted in post #3 of this thread. But short and sweet, you use xylene on things when acetone doesn&#039;t work, because it will take things off that acetone won&#039;t. <u>And</u>, you use xylene on copper coins because acetone can sometimes, stress sometimes, cause copper to turn weird colors. And xylene doesn&#039;t, but it will take off most things that acetone will.[/QUOTE]</p><p><br /></p>

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