Khatfull's aluminum polishing thread is possibly the best treatise dealing with the topic on the web.

Insofar as the paint on the frame is concerned, there are three things that I would recommend:

• CLEAN the frame. (WD40, then citrus cleaner (not on the decals!) then Windex).
• Meguiar's Scratch-X polishing compound.
• Meguiar's Tech Wax