Use NAPA #7220 or an equivilent if going the rattle can primer route. Take off any mouldings and emblems, the belt w/strips (at the base of the door windows), lights, etc. You don't want to have an edge at those areas that will start peeling back in a year or so.
If you have a pinhole issue, small little holes in your body filler, get a tube of "Icing". It is a catalyzed putty that will fill them, and minor chips and scratches and sand easier than body filler, but is not as hard, so don't get much over a 1/32 to 1/16 with it.
Take your time and do one panel at a time till you are happy with it. Above all don't get discouraged, and it will want to happen unless you have done it before.
I DA'ed mine with 320, wrapped up the flares, glass and mouldings and rattle canned it with 2 coats of Rustoleum satin in sage green, shell white and a taupe tan in a camo pattern since it is a trail rig and will get scratched and beat on. Makes for a quick fit at home or camp, Been on 4 years now and still looks decent.