I started fiberglassing the hull bottom Saturday at 1:00 a.m. to take advantage of a slight cool spell and falling temperatures. The hull-bottom 'glassing turned out to be quite an ordeal, and took me over four hours. After a great deal of trouble trying to align the cloth at the keel overlap (which only involved flipping the already laid-out cloth back over), I realized there was no way I would be able to align 16 foot lengths of cloth without help on a near-vertical surface, with it sticking constantly to the already-glassed bottom,etc. 5:30 in the morning was not a good time to be running around the neighborhood trying to get help with a difficult and messy job which none of the folks would have a clue about. Besides, the first part of my hull-bottom work had already reached tack, and I needed to do the second coat right away--which only took about 30 minutes.
So the decision was made that I would have to wait until the bottom was cured enough to sand the parts where the side-panel cloth will overlap. I will not get as good bonding, but I saw no way around it.
Finally, my question: I'm thinking of carefully sanding the parts of the hull where the side-panel cloth will overlap with 80-grit rather than the usual 120-grit. Granted this will be faster and easier, but that's not my reason. My thinking is the courser grit will give me better tooth for the epoxy to adhere to. Any thoughts?