DO NOT DO IT!!!! I tried it on one of my fender panels on my Cobra.....BIIIIGGG MISTAKE!!! it peeled in very short order from the heat and mist from the fluids in the engine bay. Really tough to remove. Don't do it if you plan on driving the car

I used a product for polishing metal called "Lighting Shine" from Wicked Products. Apply it then buff off. Shines alum. great and is easy to maintain. I used Windex to clean off the panels then on occassion would buff them with a microfiber towel. About once a year I'd apply the "Shine".