Paint questions...

Egads!!!!! Unless you like shrink back and sanding scratches and delamination, don't use a lacquer primer under a urethane paint. Look for a "2K" primer. Starting from bare metal, you can put an epoxy primer down, then body filler where necessary, then a 2K primer, sand, 2k primer, sand, etc....... they make guide coat that you can put on, or just use a can of black Krylon, sparingly or it will clog your sand paper, finish off with at least 320 if not 400, you can apply a coat of transparent sealer for adhesion promotion, then if single stage, shoot it, or if base/clear, shoot base until complete hiding is achieved, depending on the color this can be 3 coats or some of the PITA colors I've seen can be up to 7 or 8, then shoot 2-3 coats of high solids clear. I wouldn't ever put 7 coats of clear on, one rock chip and half of your hood is going to fall off from sheer weight. If you feel like Jimmy Buffet you can color sand out your dust nibs and put the high shine on it with a buffer, waffle pad, and some compound. Be prepared to sling compound everywhere.

Although I'm out of the business now, still do it as a hobby, I was a PPG, Diamont/Glasurit, and Martin Senour certified refinish tech. Hear me now and believe me later, when it comes to paint materials, you get what you pay for. I love Glasurit, but man is it expensive these days.