[Sanders]

Hello fellow Airstreamers,
I have a question about the bathroom countertops in my 74 Excella. The countertops have faded and streaked over the years. This includes the tub as well. It looks absolutely horrid. I have tried all types of cleansers, liquids, foams, and bleach. Nothing I have used seems to have any effect on the discoloration. Any ideas or suggestions?
Has anyone out there ever tried any of that new "Fusion" paint that is suppose to bond to plastics? I was thinking maybe I could try a can in the cream color that matches as close to the original countertop as possible.
At this point, I can't seem to come up with anything else to try. If anyone out there has had this problem and has come up with a viable solution I would really like to hear from you. If anyone out there has any ideas about a possible fix, I'd like to hear from you as well. Thanks for any advice.
Sanders