The wheel rims on our coach were looking rather untidy, so based on some recommendations on Facebook, I purchased the Purple Metal Polish and Aluminum Deoxidizer:

Super easy to apply; just wipe on some deoxidizer, followed by the polish, and wipe off.
Here’s a rear wheel before polishing:

And after:

A front wheel before:

And after:

I also treated the tires with 303 Protectant for UV protection:

The polish worked on the headlights too; before:

And after:

Much better!