A lot of body shops have went to a roll on primer. No masking, no moving it to a booth to keep overspray off other cars ect. You have to use roll on primer not 2k spray on. They sell the rollers white foam ones and pans at the PPG store. If you try 2k it will solvent pop and be to rough. You end up sanding it all back off. The other work well. I think Ill try this on an old fender just to see. BTW if someone wants to spray base clear cheap try Matrix brand. the clear is like 50 with hardner.
