The polished body would be a commitment! I have had a few vintage Airstream trailers. They are built of Alclad, an strong aluminum alloy sheet with a few thousanths of raw aluminum cladding for the mirror surface, the underlying alloy is of a duller, goldish silver color.
Using the correct polish, polishing machinery, and cleaning techniques, you can keep it looking amazing. But the Airstream took about 40 hours of polishing in the spring, and another 40 in the fall to maintain. Of course a garaged vehicle would be less. That being said, my current vintage trailer is an Avion, which is Anodized Aluminum, and virtually maintenance free!
Depends on what you want to spend your time doing?
