Originally Posted by scumdog
Well, a mate suggested using a green scotchbrite pad to scrub the whitewall.
I used one that I regularly dipped in a bucket of wash & wax car shampoo and gave the whitwalls a good scrubbing.
And wouldn't ya know - it worked!
About six weeks or more have gone by since I tried this trick and the whitewalls are still white!
I used to use the green scotchbrites, but sometimes the "green" would get permanently stained into the white. I usually use a small scrubbrush and fantastick.
If it's really a stain that won't come out, I've used eastwoods paint prep, but that is more for a scuff that might have happened driving. The only way I've gotten brown stains like that is from a tire sitting for years and year outside.