Cleaning whitewalls?

I have used this method for years and it works great. No matter how dirty they get, this method will have your white walls looking new.

I am quite particular about my car and wouldnt do something to it if I thought I could possibly damage anything. This is how Ive kept my white walls shiny and spotless over the past 4,000 miles.

Items:
5 gallon bucket
Car soap (I really like Mcguires Gold shampoo as it leaves a very nice sheen)
Soft car wash sponge
Lemon SOS pads
Blue/ligt blue sponge (pictured here)
Your garden hose.

Get your tires wet and wash them with your soapy sponge.

Next
Use the SOS lemon pad and scrub until all the dark blemishes are gone.

Rinse

Wet the blue/light blue pad. There will be one side that is slightly more abrasive than the other...use that side. This will remove any blue residue left by the sos pad from the minute cracks that are in the sidewall.

Quickly wash the tire once again with your soapy sponge.

Rinse
Dry with towel.

This process has served me extremely well and never fails. My white walls look as nice as the day I bought them

 

Good technical description, I have exactly that under my kitchen sink. We could swap photos.

 

I use Mr. Clean Magic Eraser.