The best way to "clean" up white metal wheels

[Hooked on Chaparral]

Good Morning,

I have a question. I am unfamiliar working with so called white metal wheels, I bought a set of "Big and Little" Chaparral wheels from R & D Unique a few years ago. I am finally getting round to using these babies for my 2C project and they could use a little TLC what is the best way to polish/clean these up? I am not looking for an alloy wheel kind of finish just something closer to what a "working" racing wheel would look like? Does this make sense? Anyhow any tips would be greatly appreciated also does anyone know if RB Motion still sells valve stems? THANKS! 

[John Pol]

I used silver polish for the rims and about valve stems Pro Tech makes some to