Hull Reinforcement???

[Capcadet05]

Hey folks, I am in the process of a total restoration of a 1971 Luders 21. The short story is that the hull was soaked and wet. In order to remove the dampness and water we needed to cut open the cabin seats and remove the cabin deck. After removing soaked floatation blocks, there was no standing water in the bottom of the hull just a little dampness needing to dry out. The fiberglass hull was in good and undamaged shape.

You can see the detailed info on my blog about it: A "Casual" Sailing Project

Backgournd Plan:
Our plan to rebuild the cabin is to lay down about 4 3/4" plywood bulkheads that will serve as the new support for the cabin floor. Then either lay down wood slats or another piece of plywood/fiberglass for a floor. From there we will build wood benches on the side. One part of the bench mounted to the floor the other portion mounted to the hull wall.


NOW FOR MY QUESTION:
Considering this situation do I need to reinforce the hull by going over it with a new layer of fiberglass and epoxy? That seems to be a lot of fiberglass/epoxy if you "just want to be sure." However, at the same time the area where the benches will be mounted will be bearing a significant chunk of the load. Should I fiberglass reinforce just this area?

An example of this would be found at :Northern Yacht Restoration | Bolero, Shields Class #9

Would appreciate your opinions on how to prep the inside of the hull for this. After reinforcing do I just need to lay down some primer to help water proof/protect it?

Thanks!
John