[Turk]

Many have left aluminum cars unpainted. So have I.
Novelty wears of rather rapidly.
I am beginning to find out why the early Shelby originals were all painted.

Aluminum looks good great unpainted for about 4 days. First time you go to clean it, you find out very fast that, there is hardly any cleaner out there (including Windex) that will leave a uniforn finish.
If you like milky, patchy, dull look you will love the look of a bare naked lady.
Different panels, different grades of sanding done on the car doesn't lend itself to proper care.
If you do what Pat Buckley did and polish the car to luster maybe then you will be able to remove any residue of finger prints with greater ease.
Any thing less than that will leave you cussing at the inventor of Aluminum.

It is better to cover it up with paint and answer the question if it is glass or alloy, than to leave it unfinished and flaunt.

TURK