I did treat all the rust chemicaly before painting. Also repaired the small hole that was under the vinyl top. Then put on 8 coats of rustoleum. Where I believe i messed up was. I did not allow enough time to cure between coats and the paint flashed too quickly. When I painted it was 110 heat index here. Going to smooth all the bubble and runs out and try again. I know that it will never be show quality but it is better then it was. Just looking to make it a little shinier. The paint job that the car came with was horrible. My hubby pulled off a sticker and it took pain and primer with it. there were bubbles everywhere. I was assured that it was painted by a pro ( ha ha). So I thought what the heck I would give it a try myself. Does not cost a lot to do and I love the work.