Gel coat is thick, heavy and brittle, so it doesn't take a lot of it.
But it provides excellent protection against UV damage from the sun.
It goes on like thick paint, and cures in a few minutes.
Once WELL cured, it can be sanded smooth (start about 220 grit for shaping
and 400 for smoothing.
Lastly a touch of polishing compound on the buffer and - it's ready to go to work.