finishing paint project

[outfishing1]

I have a 1969 glasply that I am painting the topside. I sanded the old gelcoat down to 400 grit than applied two coats of brightside primer sanding each coat to 320. I curently have 1 coat of interlux brightside paint on and it looks like the next coat may be my last. I was wondering what should I do after final coat? wet sand with 600? buff out with polisher? Is there a clear coat I could use?