Gel coat isn't going to do anything for you that a ordinary two part epoxy
paint can't do better..

I recommend staying away from white because it doesn't stay white very
long..

Sherman Williams has a epoxy cement patio paint that comes in a terracotta
color. It is much cheaper than marine paint (I don't remember the price but
it is a bargin)..

I'm using some surplus ProLine epoxy polymide and it is standing up well to
all abuse and gives an appearance that reminds me of similar color used in
my ole navy ships..


--
My opinion and experience. FWIW

Steve
s/v Good Intentions