[brammabull69]

my gas tank shrouds used to be brown instead of white and no matter how hard i scrubbed it i couldnt get the stain out. so i found this stuff in my basement called goof off. tried it and wow it got just about all the brown off. so i recommend goof off on white plastics after every muddy ride.

 

[sandmanKFX450R]

There is another product called "Plexus" Plactic Cleaner Protectant & Polish. It's in a 7oz spray can. It will remove the brown too. Remove small scratchs too. It works very well. I have tryed lots of crap to try and make my plastic look new again. This product wont do that but its the best I have found so far. Be ready to burn a ten dollar bill on it when you buy it too. $8.72 + Tax.
www.plexusplasticcleaner.com