While I would not claim any great expertise in this area - yet, but FWIW here's what I am planning to do with #365's damaged area, a smashed-in hull to deck joint area about eight inches long just forward of the forward bulkhead.

[Linked Image from sphotos-a.xx.fbcdn.net]

My plan is to grind out until I have only undamaged and unaffected material-any breaking stress on the glass fibers can cause them to be weaker than design strength- and build the area back together with glass mat and west systems epoxy.

In your case, I'd make sure all the damaged material is removed and ground back - that will give you a good strong base to build everything back together with, flowing with the original structure. A small silver lining to this is that when you're done, you won't have core under the stanchion, it will be fully epoxy.

Labor of love, indeed. I can't wait to fix it up slooow!