There have been a number of posts on cleaning the faded fiberglass with , Bar-keepers Friend, ( paste) then applying multiple coats of Zep, Liquid Look , floor wax. I cannot find the wax here in Canada, so I haven't tried it myself. I'll track down one of the posts and link you to it.
EDIT: Have a look at this post.
Zep'd my Bounder...
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.