Jacques wrote:
Yes but gelcoat will not work, it has no wax. What you need is top coat.
Gelcoat is just polyester resin.

There's more than one type of gelcoat, specifically there's
"laminating" and "finish" gelcoat. The names accurately describe their
intended function. Laminating gelcoat is used in the mold during the
layup of a hull. Finish gelcoat is used primarily for exterior repairs
and cures properly without needing to be sealed off from the air.