I don't have bubbling paint however, I do have only on the hood of my black, '03 Sahara a lot of very small "checks" in the paint. I have noticed that many of the black TJ's have this same problem. I've wet-sanded the hood and used Black-in-a-Box to help and it's done a moderate job hiding the problem. Is it cheap paint and why only on the hood. That leads me to think it's a heat issue... Anyone else have a comment?