If you have just one spot that's rubbed off, why not just reverse the tire so the bad side is on the inside?
It's still visible, but the chance that the blemish is under the inner fender is pretty good and you'll not see while moving...
Do a touch up as good as you can and my guess is that it will not show too much, if any.
If the orange is truly painted on like's been said, whitewall cleaner will probably not be good on the paint either.
Good luck though and let the guys know what you did to fix it.
