I dont know about spray glow. My friend got his car painted there and it didnt turn out good. His car was previously red and he wanted the car to be painted Midnight Blue, so they just painted over his color w/o putting primer on it and the car turned out to be purple looking...lol So idk if he need to put primer on the car or what. I know at my Dads places they ALWAYS primer the car first and then they paint it.