In response to your pm :
To be blunt... if your painting in your garage, the end result will not look good.
I see in your first photos of bodywork, there is filler on top of shiny paint. That is the first problem, if you run your hand across the bodywork, that edge will always feel unfinished. That is due to the bondo trying to chaise back or " find" adhesion. Hell I can even see an old purple sticker under the bondo!
that edge will never go away, my honest advise was what I gave you on my first reply.
All this work your doing will not hold up or last, if you want it to look good, start with my previous advise, take your time, finish your bodywork in 400g.
as for primer, many options, dupont has a 2 part primer that will work well, you will also need some plastic adhesion promoter, with you can get in a spray can.
Also when you factor in - primer kit( at least $180 for the cheap stuff) paint 2 qts ($120 for the cheap stuff) clear ($130 for the cheap stuff) and spray gun, blah blah it ends up being much cheaper to just finish off your work as best as you can, and bring to a bodyshop.