Body work is the key. If you get it straight enough, you can use spray bombs, and get decent results. If you want the spray bomb paint job to look like it was done by a body shop, you can wet sand off your orange peel with some 1500 grit paper (1000 grit will work well too, just use alot of water). I painted an old 83 F-150 with cans. I painted it in my driveway on a hot sunny day so that it would bake on almost as soon as it hit the metal. After wet sanding it, I was surprised by the results. You can always go to Maaco for their economy $150 paint job too.