Since last update it's been more sanding and epoxy work, and there are no compelling photos from that, but here's a shot showing the second coat on the interior surface of three of the hull panels.
I had a little epoxy left over, so I experimented with mixing graphite in, and applied another coat to the inside of the centerboard case side. I found the mixture rolled on just fine, though I will need at least one more coat to finish filling the weave of the cloth.
I understand that the graphite/epoxy mixture cures to a very hard and abrasion resistant finish. And that's just what is needed on the inside of the centerboard case where the board swings up and may contact the sides of the case. I'll use this same mixture on the other side of the centerboard case, as well as on the centerboard itself.
For this job I used some vintage graphite a neighbor gave me about 20 years ago. The text on the container says this is grade 402A, which is 'ground to an impalpable fineness'.