Hi , I was a car painter for 42 years and have a question about the mk ll factory paint process . My car was originally silver ,and has been painted black . I'm stripping the car and it looks to me the factory used an almost spot putty color brick red primer . I was always taught to use the primer color closest to the top coat color . As in gray primer for a silver top coat . The red boggles my mind ! Does anyone know if the red primer was factory used in all colors ? Thanks in advance !