Primered car, needs fixing, and then what.

I used the harbor freight gun for primer and paint. Mixed per the instructions, used a scrap piece of metal to test the gun, came out like glass, BUT it looked like glass before I put down the paint. Don't use cardboard or wood for your spray pattern and testing, that stuff will hold paint better than a primed surface.
Body work ( metal work and filler ), Sand, Primer, sand, primer, sand, clean, paint..I think it had 3 primer steps, but I can't remember exactly. I think I finished up with 800 grit but again, memory is a little foggy.
During the final wet sand ( when it has a bit of water on it ) you'll see exactly what the car will look like when it's painted.