Haatschi,
Spraymarks around dings would have been put there by NTSB presumably, to distinguish them from others. The punctures around the cockpit would certainly have been from rescue boats, particularly those with pusher frames with exposed lower steel (upper parts being protected by rubber).
Not easy to keep a boat in tight position without doing some damage. Even less so when the wind wants to send you in a different direction in relation to the aircraft, and you're worried about propwash or the prop itself chopping swimmers up.