M_Boats: painting fibreglass

Guys (and Gals), Thinking of painting the white fibreglass exterior of my M15 cockpit. Would paint the seats, and sides, on the inner side, a light gray, to cut down on glare. My first thought is to use a simple 1-2-3 primer and then a coat or two of flat exterior latex. But knowing first thoughts are often, wrong thoughts, thought to ask the group for any suggestions or ideas. Thanks - Brad