I was doing a neglected 96 Honda Odyssey van this weekend, and the plastic "beauty" wheel covers were coated with brake dust & grime that the Megs GC shampoo was not removing. It was just smearing it worse
I was afraid that my favourite PB Spray & Rinse Wheel Cleaner might be too strong for the plastic. So I added 4 ounces S & R to the bucket of wash solution, & applied with an old microfiber. It only took a quick wipe around & rinse & the wheel covers were clean once again.