Looking at painting a car with Summit Brand base/clear. It will be my first attempt at painting and I want to go cheap (it's a race car). Was thinking of using Evercoat Featherfill G2 surfacer/primer because I've used it before, it easily available and it's cheap. Question is will this be compatible with the Summit base? I looked at the Summit base coat P sheet and it says it's compatible with urethane 2K primers but the Evercoat is polyester. Will sealing over the Evercoat be sufficient or not? If so what would I seal with?