Before I bought my 2020 JLU, I was looking at a 2008 JK. It was a garage kept black Sahara and was immaculate, frame and all. The only thing wrong I could see were bubbles on the door hinges. The owner stated that it was a known issue with the aluminum and he actually had previously had them redone, but it returned. I was hoping this was a thing of the past. I guess not.