I’m addressing the inevitable faded yellowish plastic in this camper one piece at a time. An easy one is the A/C cover. I had regular Krylon leftover so it took more coats than I think the specific “plastic” fusion would need but got the job done nevertheless. It was cold too so that may have contributed to the slow, thin coverage coats.
I cleaned all the crud out, taped off the control stickers then sprayed top and bottom outside on a stump. Also added some new padding next to the vents where the old stuff was really crumbling. Turned out looking bright and new!