Well, not really, except try pretty much anything that's safe to use without gloves, and try on a non-visible part first. Aluminum is pretty inert to chemicals, and I'd expect any common detergent to be fine (don't overdue it, and spray on the cloth and not directly on the object).
The brushed aluminum surfaces can collect ugly dirt (grease from fingers, etc) in the small grooves. In Finland we have on sale this funny sponge made of some micro-material ("magic sponge", freely translated) which works wonders on difficult surfaces like that, with just water. Haven't tried it on brushed aluminum, though - would do right now, if I had that sponge here!