Eastwood Fender Roller Tool
Product Review (submitted on August 13, 2009):
There aren't many available, but this is by far the best. The next best thing to having a body shop. As long as you prep the surface (remove liners, clean surface, adequately heat the paint) you should have no issues cracking paint and doing a professional roll. Actually "pulls" fenders as well if you do it in several steps and keep exerting more force. Expensive, but well worth it!