Friend just bought a 944.
A friend picked up a set of 16" 951 wheels at that swap meet a few weeks ago, for $150. They're in that original gloss anodized finish, not painted.
Problem with the anodized is that while it looks good new, it scratches easily and there's nothing you can use to clean it other than soap and water.
No place locally offers re-anodizing. He found a place in CA that re-does Porsche anodized wheels, but it's expensive like $200-300 a wheel.
As an experiment, he polished half of a wheel with his orbital. The anodized layer came right off and left it smooth and shiny, but it is now an aluminum grey color, not the chrome like color. Polished on left.
What do you think he should do;
1. Leave them all alone
2. Polish all of them to be the shiny gray
3. Sand them down and paint them some color, maybe gloss black