PB wheel gel, P21S wheel cleaner, NXT Wash, Gold Class, DP Xtreme, PB wash, all those dont turn them yellow. I find that if you turn the rotors yellow, then the second you hit the brakes it turns up a lot more dust. If I use a harsh wheel cleaner such as PB spray and rinse. Then once Im done using it Ill drive the car up and down the drive way a couple times hitting the brakes to get rid of it, then hit them with the pressure washer for a final cleaning. When I do this, the water that flows off the rim is black even though the rim is clean. Im not sure if this happens because the rotor is yellow or not, Ill have to experiment more with that.