Originally Posted by ftconstruct
Regular soaps will cause the rotors to rust up and then sling orange dust all over the wheels the minute you start driving. I'm not a fan of Sonax because it smells like crap but P21s wheel gel works well and prevents rust on the rotors.
While the PS21 gel works decently, I don't agree that it will prevent rust on the rotors. It lessens it some but definitely does not prevent it.