Trojan boats stringer delamination

We'd need a bit more information if you want an accurate idea. Pictures as well.

Is it really glass or is it plywood covered with chop mat... Impossible to answer without knowing how much of it needs to be fixed. If wooden cored and they re rotten the whole length it could cost as much as the boat is worth...

Old F series boats had Douglas fir stringers. Trojan in their wisdom didn't glass over the nice big limber holes. I cut mine out with a sawzall and replaced them with marine ply laminated with West System epoxy.

I set up an a frame in the salon, pulled an engine and did one side at a time. Replaced most of the framing under the salon door and aft bulkhead at the same time. Received estimates of $12-30k for the job and that was 16 years ago.

How was it determined that the wood stringers where integral to stringer structure as opposed to just preforms for layup of fiberglass- fiberglass final shape yielding nescassary strength for stringer design ?

Would resin cast epoxy Sytems suffice in adding nescessaty strength in replacing the wood stringers -once all rotted wood is removed ?