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<p>[QUOTE=&quot;desertgem, post: 3021112, member: 15199&quot;]??Why use Goo Gone? it is a pertroleum extract produce and also includes Limonine, a Terptine, and Orange sweet extract?? Why should it replace acetone. The idea that acetone may discolor copper comes from 1 team of researchers working for a company that was trying to convince people not to use acetone in degreasing copper tubing in manufacturing, but their product instead. It required a group of environmental factors that does not normally occur , such as heating the copper first ( but not enough to ignite the acetone) or leave it in high water vapor&nbsp; ( hard to do ) since acetone evaporates so rapidly normally. You could ( and they did) set up an experiment to show it is possible to react, but not while cleaning copper coins with it as described in CT.&nbsp; No one has tested goo-gone under same conditions so who knows.&nbsp;&nbsp; IMO of course&nbsp; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />&nbsp; Jim</p><p><br /></p><p><a href="http://www.oregoncoastcc.org/wp-content/uploads/files/maintenance-and-janitorial/goo_gone.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.oregoncoastcc.org/wp-content/uploads/files/maintenance-and-janitorial/goo_gone.pdf" rel="nofollow">http://www.oregoncoastcc.org/wp-content/uploads/files/maintenance-and-janitorial/goo_gone.pdf</a></p><p><a href="http://www.stonybrook.edu/vescalab/research/research7.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.stonybrook.edu/vescalab/research/research7.html" rel="nofollow"></a></p><p><a href="http://www.stonybrook.edu/vescalab/research/research7.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.stonybrook.edu/vescalab/research/research7.html" rel="nofollow">http://www.stonybrook.edu/vescalab/research/research7.html</a>[/QUOTE]</p><p><br /></p>

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