3m paint stripper..... And it's paint on an alloy boat not sure about much els paint is all over the boat my grandad painted it 15-20 years ago nice and thick i was grinning it off with a wire disk that was easy on the outside but not so on the inside
Go to ace hardware and pick up a gallon of "Dad's" stripper. It sprays on as a liquid and then gells up. Let it sit for about 15 to 20 minutes and then spray off with a pressure washer. Wear gloves and protective eyeware, it is some wicked siht.