Danno,
Lots of people paint boats with acrylic polyurethanes. It's not as hard or abrasion resistant as linear polyurethanes (awlgrip or interthane plus). You can tint with pigment compatible with epoxies. May be worth checking into awlgrip stock colors. They make about 10 versions of off white. It is very expensive but you can get it mail order at a discount.

Kevin