Does anyone have experience with painting enamel on top of a powder coat primer? I took my rims to be sandblasted and was directed to a place that works almost exclusively refinishing truck rims. They said they'd bead blast the rear weight, rim, and spoke, plus powder coat on gray primer for $60. Not bad. I like the idea of getting the rims back already primed but am concerned about getting a top coat of enamel to stick to the powder coating. Some think I'll need to rough up the powder coated primer to get a top coat of enamel to stick. I may end up being better off just to have them bead blasted and spray on primer myself. Anyone have any experience/suggestion? Thanks.