Minor bubbling on rocker

I'm no expert on bodywork, but I don't think sealing it up is the answer. When cars are manufactured. the rockers have a pinch weld on the bottom, and that pinchweld has channels formed in the stampings before they are welded together, specifically to drain and ventilate these areas. If you seal them up totally, the condensation and other moisture accumulations cannot drain or evaporate away. My point is: by "sealing it up", you can make it worse long term. I've been told the same things, there are no magic bullets, it's best to cut it out, repair it, primer and repaint.