I know you stated in your question that you had already sanded and buffed
the paint, so maybe try Imperial hand glaze. It is awesome! A little tuff to work it in, but worth the time. As far as it's being new paint, 21 Days to max cure on all urethanes for waxing. Slightly shorter if the paint was baked.
I'll do 2 lite coats of hand glaze then follow up with a good carnauba wax with no cleaners. Two lite coats on that as well. In addition I like the micro fiber towels (Cheep at Wal-mart). Change frequently. Last step some show and shine!!!
If you are going to start from sanding and buffing, here is some interesting reading on the 3M Perfect-It system. We have been using it for 5 years now They just came out with an ultra fine machine glaze for final glazing that we will be testing next week.
http://solutions.3m.com/wps/portal/3...ts/Perfect-It/
Good Luck...