Thin body panels, whether high strength steel, or aluminum panels are a consequence of the overweening quest for infinite MPG. The high strength steel is more expensive than ordinary steel, but they selected the material because they can make the panels thinner, to save weight. Aluminum, same calculus. If we could stop the ever-advancing EPA CAFE standards, which are now at the point of diminishing returns, this crap would cease to be a problem. We are well beyond any sensible cost-benefit analysis at this point, and should roll this back a few years to allow technology to catch up.