I agree... my car has them on both doors.. and I can see them on the rear fender in the middle when the weather is coldWell if you look at the design of the Koup, the rear wheel wells stick out a little farther to make more "room" for the trunk. I don't know about the sedan tho, never really seen one in person. But I could see how that design would make for creasing in the exterior. Just weak spots I'm sure that don't handle the shifting of the body and the cold weather to well.
Thin metal etc..
Seems to go away when the weather is warmer.. come on summer lol
still have a wait for that I know