Welcome to the forum! I have an 86 with the same "brushed aluminum" finish. I've been looking into polishing for a while and originally thought it was not possible on later model aluminum. However there was a post about this earlier that changed my opinion.
What Year Did the Exterior Finish Change???
I think polishing on later years requires wet sanding to a smooth surface before the polishing process can begin.
Here is one more link to InlandRV. About halfway down there is a picture of a polished 97 Limited
THE POLISHING GURU
Good luck and if you start polishing, please post pictures!