An interesting project - Bilge in sheathed timber boat

[duncan mills]

Brands01
You may have executed your plan by now , but here is my thoughts on your question.

I have been researching wooden boat restoration for several years as I have three in various stages.
I have not found anyone that recommends sheathing traditionally constructed boats in Glass reinforced epoxy. Those that have tried have ended up with enormous damage to the underlying timber (shearing of the sheath from the surface of the timber) due to differential expansion due to changes in ambient moisture levels and temperature, and hull movement. The story with Dynel a acrylic/pvc copolymer is different, there are quite is a large number hulls in service; The weave apparently is more bulky, which probably gives it more stretch; Its use consequently requires more epoxy than glass of the same weight.Finding epoxy with the right amount of flex probably is important (medium modulus) One of my boats is a Hartley spindrift 30 ply protected by Dynel sheathing now about 40 years old with no sign of problems.