[Perfectlap]

That's true P21s strips everything off. Which is really what you need. Waxes and sealants are good against weathering but useless against brake dust. The dust will cut through your wax/sealant and stick to your paint finish.
That stuff needs to come off each time you clean your wheels, in other words waxing wheels is not a long term treament like layering Klasse on your hood.
A real pain in the but those expensive Porsche wheels...