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<p>[QUOTE=&quot;desertgem, post: 4667347, member: 15199&quot;]Well I did go back and re-read it, and I didn&#039;t see any possibility that machine ran for that long. I re-read twice and although the xps unit was specified , the ambient light was not as to source or level for 18hrs. The XPS was quantitized for source and level , but not how many times it was ran and when. Anyway, I do know how some of these experiments sourced by outside supporters tend to go in certain directions, but thats higher education.&nbsp; I asked 3 people who do a lot of copper tubing/fixture work and they still use acetone and if I had any reactions with it, I would certainly not use or recommend it. YMMV, Jim[/QUOTE]</p><p><br /></p>

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