: I am rapidly approaching fiberglass and epoxy time on my Guillemot.
: My question is how can one do both halves at once. I have an
: internal stongback and only one set of forms.

I can't see how this could be done. You need some overhang of fabric at the sheerline (and also need to take care not to join the halves by stray epoxy) so you need to alternately tape off or otherwise protect the half you are not coating. Until the epoxy hardens, you can't turn the boat over to rest on the freshly coated side anyway.

When I did my deck last week I seal coated in the evening and then put the glass on the next morning, doing the fill coat about 5 hours later (I had the room near 70F).

I would not use wood/epoxy on the staple holes- I used a wood filler that color matched OK, it is much easier to sand flat.