One of the copper epoxy products such as coppercoat is the best solution in my mind. Never wears out, can be sanded super smooth and even adds anther level of protection. Good work by the way and thanks for the running updates. There is not much more satisfying than launching a self built boat. Best of luck.
I remember crossing the finish line of the surf to city inside course, 99' I think, at the same time as Blackbird crossed after doing the outside course. All we could see coming at us was a ball of spray with a mast on top. It was like a batman movie, very impressive.