Re: Gel Coat
folks with lots of $$$ have the yard remove the gel coat from their brand new boats. Gel coat is not considered a quality finish.
Actually Gelcoat is a very durable finish and the repair cost is a fraction of Paint.
I dont know why Anyone would Remove the gel prior to painting. ???
Generally an epoxy primer and a two part polyester LPU coating (google lpu). Awlgrip is one vendor of LPU and other coatings if you don't mind paying 300% more than they are worth
Just to let you know that Gelcoat is a 2 part polyester

.. LPU is Linear Poly Urethane ( Nastiest of the Nastiest of paints IMO ). Its Very hard to repair. There is a way to repair LPU but is costly.
A good alternative of a good topcoat paint is Imron or AwlCraft 2000. Very expensive However it is repairable.
With Gel you should give your sanding profile a bit more bite. 120 or 80 grit is best ( I prefer 80 grit for full sprays ).
YD.