When you get whitewall tires from us, do not lay the blackwall side of the tire on top of the whitewall side. Keep the whitewall with the temp blue-coated surfaces facing each other until they are ready to install. For long periods, more than two weeks of storage, place some cardboard between tires. Failure to do so will cause server surface staining.
When the tires are installed, please make sure non-marring tools, such as rubber coated pry bars, rubber mounted/dismount heads on tire changers are used. The blue protective coating should be removed after installation with just plain water only. Spray down the blue coat with water and let it sit and soften/loosen up for a minute. Then wash the blue coat off the tires thoroughly with more water. You can use a good scrub brush also, but it is not recommended to use soap or other cleaner, as they will make the removal more difficult.
The whitewall rubber we use is a triple layer rubber that is supposed to be stain-resistant. But all new tires have a lot oils in the sidewall that come to the surface over time. These oils should diminish after the tire gets about 2500 miles of usage on them. From what we have seen, some discoloration or yellowing to the whitewall may occur, but it should be cleanable. To prevent this, we highly recommend that you frequently clean the whitewalls and clean any stains as soon as possible. The longer the stain sits; it can become more difficult to clean.
For general cleaning of the whitewall, do not use any harsh chemicals (like bleach) to clean the whitewall. We recommend using a degreaser like super clean or simple green along with a brass bristle brush (some bbq brushes are brass). Make sure not to use any silicone based cleaner. Do not use any tire shine on the whitewalls. It will draw more oil out from the sidewall of the tire and cause discoloration of the white wall.
If the degreaser does not the clean the discoloration to the whitewall, you may use an abrasive cleaning pad, such as wet sanding the whitewall with a 220-grit sandpaper, wet sanding with a fine to medium grit sanding sponge (available at your home center / hardware store), SOS, Scotchbrite, scouring pads, etc. Use the appropriate pre-cautions when trying any of these methods, also make sure not to damage or scratch your wheels!