If you follow the prep. for applying the clear coat you’ll pretty much destroy what you’re trying the preserve. Repeated waxing would likely be you best option but preservation and sticking something out in the weather 365 is like putting white carpet in the kitchen but not expecting it to get dirty. Mother nature is going to take her toll on more than just the paint and decals. Nice original examples are not common. Junk motors are. Get one (or some ) of them.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.