How do i get my vert top white again

it's like the white is fading or something if you look really close there black dots between the white bumps it might even be mildew but i dont think it is, will white shoe polish work or is there something out there that will that i dont know of. i dont have the money right now to buy a new top. so i need to just do something with it until i can afford one thanks
 
Westley's Bleach White is some awesome stuff. It contains bleach, but seems to work much better than bleach water. Just make sure you do small sections at a time as stated and rinse it really well. I agree with the stiff brush too, that is necessary. There has got to be some kind of protectant you can put on there too, so it wont get so dirty as quick and will be easier to clean in the future.
 
I actually have used just Comex and a stiff bristled brush. Then afterwards you really need to get some kind of vert top protectant, The UV rays, dirt, grime ect on it or hitting when you are driving will affect it.
What about a new top? Expensive but sounds like it may be getting time.
Good luck! :nice: