The hood we scored from the junkyard had been painted two or three timesplus the primer that we'd applied after the scoop installation. Thetrick to this or any paint job is to get a stable base before you startto build up the primer. We used a DA with a 150-grit disc and sandeduntil the surface was even and smooth. Don't worry about rock pits anddeep scratches at this point, and you don't have to sand all the way tothe metal. According to Stevenson at Gold Coast, sometimes paint doesn'tlike to stick to bare metal. After the 150-grit, we finished it with a320-grit skim. Paint that is cracked with spider webs and crow's feet,also known as lacquer check, will crack again under the primer if notsanded smooth.