I have a white cabin door and the top of it has yellowed. Any of you ever tried to polish the door? I was thinking about using one of those headlight restoration kits.

Use Old school white Colgate toothpaste and a buffing wheel

I'm surprised to hear about your situation. I've not heard of one yellowing before. Was the boat originally from deep south with high UV exposure??

No its from eastern Washington but they do get a lot of sun over there.

Its just the top, the front panels are still nice and white.