Now you do realize that HOW you spray the paint affects how it looks, right. Thin or thick paint aka amount of reducer, dry light spray or wet heavy coats, hot or cold day, hot or cold paint, humid or dry air, pressure at the gun, Etc.

Painting over bare metal makes the paint look a bit transparent. That is how wheels are painted. Try it at home sometime. Topcoat over primer or bare metal and see the results.

When was the body of a car painted over bare metal at the factory? Not at Chrysler, they were primered and sanded before paint.