My coach has the Accuride wheels which have a clear coat finish (Accu-Shield). If you have this wheel type (my wheels have a decal and stamp on them identifying them), be careful you do not remove the coating while cleaning. Some chrome cleaners and wheel cleaners/degreasers are too strong and can remove the clear coat.
Accuride has a cleaning buletine (2.0037) mentioned that they say has cleaning instructions - but I can't find this online.
There is also a bulletin on "repairing minor damage too (attached).