Yes.
You can paint aluminum. Just depends on the amount of work you want to put into it. The number one concern is surface prep. Aluminum gets chalky. If you decide to wash it with an aluminum cleaner, be careful what else you get it on because it can etch other surfaces (like glass) if not promptly removed. Wipe the surface down with a mild TSP solution, then prime and topcoat. You're not painting the Sistine Chapel, so I wouldn't get all caught up in "text book" techniques, your results will be fine.