From my experience... which over 40 years includes various lines of Dupont, Ditzler/PPG, and many many others... what you need is a stable paint, that sets up, and does not continue to shrink AFTER it is sanded and buffed! I use R-M, which I believe is also what Foose uses.

I let it dry two days in the summer months, and an extra 1-2 days in the winter, before I sand and buff. At that point it is becoming very stable! In about 15-20 years, since I was intruced to it, I've never had any desire to switch away from my favorite R-M "Diamont DC92" clear, as the others have always disappointed me by comparison.

There are stilll many that I have NOT tried, so you need to speak to people who do high end finishes with those BEFORE you assume that all popular brands are the same. They are not!!!

By comparison, I recently used a PPG clear that a customer had already bought, that I let dry two weeks... sanded and buffed... and the orange peel and a couple sags I sanded out CAME BACK! I talked to a guy who uses it exclusively. He said to let it dry 3-4 months! Are you kidding me???

Good luck to you.