If I was doing over again, I would use auto paint for the whole process, but since I worked at a paint company, and one of the units was moving, I was able to get paint at a very good price. They were going to throw it out! That is where I got my clear coat anyway. Very good stuff with liquid protection against gas, oil, hydraulic fluid, jet fuel, and so on. The base I had was made with material that was just about out of shelf life. The base thinner/reducer/activator was changed several times, issues with blistering. Well, I had to shelve the base, to bad cause I really liked the color, but PPG Chromabase, I know bought out, was a good match. Anyway, the clear is a three component mix, 2K urethane. Clear, catalyst, isocyanate, and the activator. Depending on temp you use the matching one. Enough clear for a 5 gallon mix. Number for clear is F3029 by Awlgrip, for high end boats initially. It's what I have, I'm going to use it.