No, they dont. Well, my 2001 Aero is 100% original paint and does not have any of the cracks. But, its never winterdriven and have spent very little time in the sun too. I think the sun is the killer here, Im guessing the heating of the roof makes things move and the paint is not flexible enough there. So, above is maybe correct – cars never driven dont have it… But mine has done 140.000 kms, but only in swedish (cold…) summer.