As a newbe to this forum and with no building experience as yet, trying to absorb all of the information in relation to priming is a bit daunting. It seems to me that any corrosion problems would most likely occur at the joints. If the joints were bonded with a product like sikaflex (polyurethane) to eliminate any cavity for condensation would this suffice as a corrosion reduction strategy? Would this add too much weight? Would the preparation required be less than that for priming? Would the extra strength built into the structure be of any benefit? Would any fatigue problems be reduced?