This is my first time paint im not using a HVLP gun. I sprayed the PPG epoxy primer i got orange peel. Do i sanded until smooth or do i wait after i do my body filler work..or can i just leave it like that, im planning on spraying it with some filler primer after im done with my body filler work.. one more thing can i spray more epoxy primer on the car if the primer is already dried or do i need to sand to get it to stick.... do i sand the epoxy when im ready to spray the primer filler?