When you apply bondo or the fibrrglass version of bondo or whatever you will have air bubbles...I dont care what you do. However these airbubbles will eventually expand or blow open(for a lack of a better term) and when That happends air,water or moisture will get in. That bondo may stick good to bare metal but mother nature will beat the heck out of that metal over time. You stand a much better chance with the sealer over the bare metal then apply your material. If you live in the desert.........fine do what you wish but the folks that live and work in the rust belt know better.
I will not argue over my experience. Its not worth it.
Quote:
Originally Posted by marks69cruiser
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? |