Yellowing fiberglass door

Superclean.
Find it at Walmart in the automotive section. Purple bottle. It does everything other cleaners claim they can do. My DW discovered it in her quest to find a cleaner strong enough to take the fly spit off vinyl siding (works great for that too!).

Looks like I have a plan. Guess the secret would be to use a good paint. Thanks everyone.

I also have experienced a lot of yellowing on the white plastic parts on the exterior of the RV. Those look real nice if paint them with a can of spray paint designed for plastic.

I did like others above and painted one.
Except I used the Rustoleum roll on method.
I did remove the door to work on it.

The door looked brand new afterwards.
Even repainted the window frame.

We painted ours too. Couple cans of krylon paint, looks great and has for a couple years.

I just masked mine off and repainted it with a high quality spray paint. Three light coats, then a coat of heavy duty carnauba wax