Looked at your insta to try to see what you're talking about. It looks like this boat is glasses outside and bare wood inside? Or maybe just epoxy coated outside and bare wood inside?
Doesn't look like anything inside behind the decorative panels
was treated, right?
If that's correct, DO NOT GLASS IT.
If you glass over raw, breathing wood, you run quite a risk of trapping moisture in the wood. It'll stay better exposed to the air. Keep the wood dry by fixing all the leaks
. Rainwater is what kills wood.
You don't need "strength" inside the hull. The hull is the strength. Glassing a plywood
hull is typically done outside for the purpose of abrasion resistance. Not for strength. The plywood
and joins are plenty strong. Glassing it inside could make it weaker by keeping water
in the wood.
Keep your bilges dry/dusty. Be vigilant about that. Then the wood will stay nice and dry and last a long time.
I see some rot
. Possibly surface rot
.. in one of your pics. There are 2 ports
in the pic and the wood is all black. That black is the rot. Keep a good eye on that.