Soemthing I've wondered about, could you Line-X(or similar spray on bedliner) the plywood bottom of a FWC? I wonder if the wood has to "breathe", and I wonder how well a spray on bedliner would stick to plywood?
I've got access to all the tools needed, and I could get the spray on material from Eastwood for less than $200...I'm thinking spray the bottom with bedliner and not worry about it for the next decade or more.