My 70 Dart

Ok, I have been working on the car. But I have been applying the primer surfacer, then a light gray primer as a guidecoat. I've done that 3 times, and have to do it at least one more time. Looking pretty good if I say so myself. Oh, working on the body at the moment. Giving the driver side door and fender a rest. I just may go back and reprimer the two instead. That way I'll make more progress instead of thinking I have it. And won't waste my subtopcoat. I'm learning on the fly here, so I have to redo an awful lot. Will I do this again...NO!!! But it will definitely be easier next time. Oh, everything is an epoxy, except for the subtopcoat. I need a urethane sealer over the epoxy, and that is what it is. I could of used a urethane primer to seal, but as long as it's a urethane I should be ok.
Added pictures. Primer surfacer is black, guide coat is gray primer. I figure at least one more coat of surfacer will do the trick. I didn't yet sand the bottom half of that side yet. Had other things to do today, will sand and spray tomorrow.