How far do you want to go. The "A" should have a 70% reflective gloss level. That like twice as good as modern car. Due to the paint being buffed on the line. I've had good luck with the "Presta" line of compounds. If you've painted the car with base clear you need to cut the surface with 800, 1200. 1500 sand paper and then buff. This should get you close but not to shiny so it looks like plastic.
Hope this Helps: The Old Tinbasher.