I think that makes my point about this being a design defect, I don't think that an owner should be required to get on top of their trucks and washing and waxing the roof as much as really needs to be required with this design. Really it is not easy to do. As salts and acidic minerals deposit up there they will eventually eat through the paint causing this. If they just reversed the dimples this would have never happened.

My Suburban's roof is dimpled outward, are GM engineers a bit smarter, I really don't think so. I can't figure out why they did this.

Johnny