aft hatch - Starboard side

[MM33]

My first hatch project came out with a lot of alligator cracks (is that what its called?). Although the hatch is the correct size and shape its probably not worth fixing it because they are pretty major. I think what happened was I put the 2nd layer of gel coat on too thick and when it was drying it was chemically quagulating in spots. Can I use just one layer of gel coat, but put it on pretty thick or no?? thanks