this is my plan. use 3m 4 1/2 sand and strip discs to get to bare metal. then apply an epoxy primer ie dplf or spi. then guide coat,block sans w/120 and apply filler(rage gold). after final blocking reapply more epoxy. then shoot 2k hi build primer before base color. im new to this, have plenty mech experience but never done a real paint job/body work. id like to do the prep myself, i have a large compressor, paint guns/regulators/respirators etc, but would farmm out the final sand and paint. am i in the right direction? some people say only apply filler over bare metal, not over any paint?