The problem I am having is "experts" who write into forums, like you "Maximum Destruction", are saying one thing. Than I find a CREDIBLE source online saying the exact opposite. You can see why there is so much miss info going around. I don't understand the "common sense" of why body filler would "sweat". I could see it absorbing moisture, but not sweating. Primer over the filler would stop the absorption. Is that not common sense?