I am almost ready to paint the boat. Its a 12' fiberglass foam boat. I had sanded down all the way to the fiberglass and patched some holes with resin. Now I have sanded it down. I am thinking of using a marine urethane 3 part paint and then putting a clearcoat over it. Do I need to prime the boat before painting it? Also, will 1 qt of paint and gloss be enough to cover the outside of the boat if i'm spraying it? just trying to figure out all the details before i get started. Thanks for any help!