Remembered a buddy who took a job on a pier in New Hampshire. He coated his gear like usual, but the salt just ate it. Found out the hard way when a winch cable seized up, all crusted with rust. He had to switch to this thick, waxy grease on everything that moved, and he'd wipe it down and reapply almost every other day. Said it was the only thing that worked.
Oh man, I read that coastal salt spray is brutal. Honestly, a guy told me they use a heavy-duty anti-corrosion coating on everything, way more than inland. Tbh you gotta coat it and then check it constantly.