After knocking the forms out and flipping the canoe, I could see I had not been diligent about making sure glue was uniform across the strips. There are gaps where there was no glue. (The outside is fine.) Should I go ahead and apply the fiberglass cloth and epoxy, or should I roll epoxy into those gaps before adding the cloth?

you fill these with epoxy mixed with sanding dust. scape off any excess filler. You may any to sand again after filling.

sedges: "you fill these with epoxy mixed with sanding dust. scape off any excess filler. You may any to sand again after filling."

Ditto or mixed with wood glue.
CB