How can I get rid of the cancer spreading across my rear window without ruining the plastic? You can see it on the bottom.

 

WOW that is the worst I've seen!!

Hmm....when my old top had some, I used the finest grit rubbing compound I could find...

 

mine isn't quite that bad, but i definitely understand your pain. so i'm looking for a solution too.

 

you know my window used to look worse then that, so i replaced it with a new one(the whole top) i dont know what you can use to take it off but keeping it from spreding is what you should try. the reason why the window turns yellow is because of UV rays from the sun. what i do is but a large towel over the window when my is car parked in the sun. its been working so far, just think of a way to keep it on with out the wind blowing it off. thats my own personal solution.

 

My brother gave me this plastic window polish that he had from when he had his Wrangler, it works good. I will get the name off it and post it. Its a 2 step process I believe!

 

3m makes some. it depends on if the gray is on the surface of the plastic. i've also used some stuff in a white bottle with blue stickers. cant think of the name. quick search on the web came up with this...........http://www.properautocare.com/renplaswinpo.html