> OK what cheap solvent dissolves potting epoxy? I'd love to > know. Even the vicious stuff I've tried goes nowhere (fuming > nitric acid for instance). Methylene chloride can attack epoxy. It breaks down most alkyd and emulsion paints and resins. Often sold in a spreadable form (like wallpaper paste) as general paint stripper. I think the filler is cellulose or aerogel, something like that. It goes after paint films pretty quickly and vigourously, not sure about the time needed to eat through a block of epoxy. ISTR some organic sulphides can damage epoxy too. That's starting to get into haz-mat territory, although getting a good whiff of methylene chloride is no picnic -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.