Update: Ok is good enough... I hope!
It didn't come out nearly as slick looking as Gene's, but I think is should be fairly functional. It was the first time I've done anything remotely like this, and I'm pleased with how it came out overall. I'm very messy and the wood needs to be cleaned up a bit.
Things I learned:
I cut the strips of fiberglass too narrow. I realized this after looking at Gene's pictures closer. It made it a lot harder and likely reduced the strength of the lips. I did make them pretty thick height wise, so it should last a couple of years I hope, but if I have to do it again I'll use much wider strips of fiberglass.
I used a filler product (pictured) to make up for some of my cosmetic errors and also to round out the corners so the fiberglass would hold better.
When I went to reinstall the hatch it didn't fit towards the front (bow), despite all my measuring. I started to sand a lot... but then took a closer look at the rails. They were on cockeyed, and I realized that a previous owner must have made the same *error* as there were a couple sets of screw holes. I used the other holes and the rails widened enough to have a great fit... thankfully, before I went too crazy on the sanding.
I have zero clue how the paint sprayers work. I thinned the gel coat as directed on the can, and followed the directions, but didn't get them to work. I'm a moron! - I used a paint brush and I'm content with the less aesthetic result.
If anyone has any questions about this project ask Gene (lol)... or, if you want a total novice's take I'm happy to discuss what I learned.
(the pics are out of order... sorry!)