x2 or 3 from what's already been said.
In my experience, there's no way to clean that plastic. If it was worthy, you could try painting it, but I've found it never looks that good and if it needs painting, it's probably too brittle to worry about anyway. Now paining a new one might be a good idea, so the sun doesn't break down the plastic...
2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9467.8 (as of 5/26/19)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR