That's an awesome Buick Brad! I'd love to see finished pics. Are you doing the complete restoration or just the paint?
I'm just doing a repaint, lizard skin the firewall, and some mechanical service. This car was done in the late 80's by my wife's grandfather. It held up great but the laquer top coat was cracked. Since I know the products he used I figured I could sand off the laquer and go over. I'd never do that for a car that is unknown. The paint cracks were through the DP40 epoxy primer so I had to strip it.
I took a picture of the fuel door to show the layers. The green is DP40, Yellow is K200 urethane, gray is Kondar laquer primer, and white is acrylic laquer paint. All PPG products. I don't know why he used Kondar over the others but he did that when he taught me how to do it in the mid 90's. I've never seen the DP40 crack before but we own two of his old cars that have the same laquer cracking and they might be from the DP40 also. I'll know someday when I get enough time to repaint our cars.
The car is a 53' Buick Skylark. First year and a one year bodystyle. They were built for the 50th Anniversary of GM and were paraded around the country with the new Corvette, Eldorado, and Olds Fiesta with the GM Futurliner. All considered "Sports Cars" at the time. I've driven several of these over the years and they were factory customized Roadmasters so a sports car they are not. Great riding though.