I think we are talking about minor fibreglass damage at the most. If there is any, I would expect cracks in the
gelcoat on
deck, around the mountings. Also check underneath the mountings.
Personally, if I'd gone to the trouble of taking the pulpit off, I would oversize drill the bolt holes, fill with
epoxy, then re-drill, to seal the
core. Then I'd enlarge the
backing plates if they didn't look sufficient.