What's the best way to clean these wheels without ruining them? I have a gallon of "heavy duty floor cleaner" (sodium hydroxide based, very alkaline) in my shed. There's also some regular old degreaser lying around, like the stuff that comes in big aerosol cans from Supercheap auto. I googled a bit, but couldn't find anything really conclusive and don't want to ruin these great wheels.
What do you guys use? Any suggestions? Thanks!

