Today, as the weather was (in Down East parlance) "kicking up a slight mullet blow," I was able to sand up, shape, radius, and fiberglass the engine compartment hatch.
Hatch = Lid
There is a lot of technical stuff going on at the corners, but it rather defies description unless one is familiar with the fiberglass process. I'll spare you all the details. My boat builder comrades will pick up on it.
The actual process took a tad bit longer than the video.