Many years ago on a July Saturday night along with my GF I stopped at one of my gearhead buddies places, where he was in process of spray painting a bondo laden Jaguar coupe with bright red acrylic lacquer. As I was experienced in shooting cars he asked if I could help him by mixing up a batch...
I've got Marvin Ultimate casements and they have worked out very well. They are not the cheapest option but to me they were the best of the higher end units.
One thing I learned is to get quotes from multiple distributors once you have settled on a manufacturer and model. I saw price differences...