Andrew Butchart wrote:
[SNIP]
My concern is whether the resin will be able to take the bending after it
sets up, or will it crack? Has anyone else tried to do things this way?
[SNIP]

Dear Andrew,

Whether the resin will crack depends on how thick of a coat you decide
to apply, and how much you're bending the panels. If I were you, I'd
coat the inside of each panel before putting it on during the "tacky"
phase of curing. If it does crack, you'll have to seal those cracks
while crawling inside the boat. Hey, at least you won't be doing the
whole job from the inside.

Mind you, if you're building a boat that'll spend most of its time out
of the water, I wouldn't bother coating the inside with poly. I've seen
many interior poly coatings (especially the thicker ones) unstick from
the plywood, yet stay in place, retaining dampness between it and the
wood. If I were you, I'd just bed my frames properly with either a
plastic adhesive sealant (like 5200) or something else that'll prevent
moisture from finding its way between frames and hull skin. Exterior
house paint would be fine for the interior coating, and you can just
slap on another coat when you've scratched the inside.

I've seen you on the group for a few years, so I assume you know how to
build a "cadillac" boat. The above is how I'd do things if I were
building a dinghy on a tight budget. I wouldn't listen to the doomsday
prophets, either. Your little boat ain't gonna disintegrate or
spontaneously explode into a cloud of wood chips and sawdust, while
you're out a-fishing, just because you didn't use top-quality
materials.

Regards,
-Max