I believe that autozone has a fender rolling tool that you just bold to your hub and rotate the hub to roll the fenders in their free loan-a-tool service. I have also read articles that say that if you want to save your paint, you need to use a heat gun on it and heat the fender to something like 120 degrees.
oh yea, and not to hijack but I am wondering how to measure backspacing. I am not to that point yet but is there a formula or something to figure out what I need?