I paint for a living. I'm also a paint section guru on nastyz.com the 70-81 Camaro owners forum. 25,000+ members.
You can get a great finish by:
SPI makes a great epoxy primer. Google Southern Polyurethanes.
DuPont NASON brand high-build primer 421-19 over than. Lets you sand the panels flat and straight.
The basecoat is the actual color you will be using. 2-3 coats of it and then..
Clearcoat to protect the finish. The clear can be sanded and buffed to a brilliant shine.
See some of my work on my shop webpage: Welcome to Speed and Performance
on the paint and body page.
Questions? email me firstname.lastname@example.org