I used the eastwood stuff on a set of headers. I prepped them exactly like they said. I sandblasted them and washed them off with acetone before applying the paint. I broke them in just like the instructions said too. End result - they started to peel in a week. They look 10 times better then rusted headers, but give it some more time and Im sure they will rust like before. I dont know what I did wrong considering I followed the instructions perfectly. The only thing I can think of is maybe I didnt put it on thick enough...in either event, I probably wouldnt use it again. I have heard of some people having success with the stuff, I just am not one of them.