My new fiver isn't the dark colored cap, but more the tan, or off-white color. I am waxing the entire rig twice a year and will try to get a third coat on the front cap a third time.
Any colored material will fade, no matter if it is your residential siding or your vehicle finish. You won't notice it with white finishes, but they actually fade also. If you ever remove old decals from a white RV you will see how they have faded.
I am just keeping high quality wax on mine and hoping for the best.
2014 Montana 3725RL (Goodyear G614 Tires, Flow Thru TPMS)
SPENDING THE WINTERS AT OUR HOME IN SW FLORIDA. THE REST OF THE YEAR SEEING THE U.S. FROM OUR LIVING ROOM WINDOW!