I don’t think there is any core in the hull sides Can’t tell if the second picture is the side or if it is the deck which indeed is cited

I don’t think these dry patches weee caused by hurricane damage. My boat took out a piling during Irma, the hull deck joint and toe rail was ground open over 15 feet. Aft ER bulkhead wasn’t just loose but shifted in a couple of inches yet the hull side doesn’t show a single stress crack and no dry spot

Personally I d leave it alone.