Sandeep: Thanks a lot for that link. I tried cleaning the board with Iso-Propyl Alcohol but it did not help at all. Do you think I can still apply the rosin+white spirit coating suggested now or is it too late to do a clean job? Thanks! On Tue, Mar 4, 2014 at 8:26 AM, Sandeep Lohia <sandeeplohia12@xxxxxxxxx>wrote: > previously meant to say to Thomas (was in Bus) > > > Here a thread : > //www.freelists.org/post/minima/Copper-sheets,7 > > if any body finds it interesting about homebrew conformal coating... > >