If you want to keep the quality and shine of aluminium works, then you need to know how to properly polish them.
Make sure that you use the right tools and materials for the job. You don’t want to damage the surface.
Use a sponge to apply some cream metal polish. Follow with a buffing pad, or you can just spray the aluminum using a household cleaner and then wipe it dry with a clean cloth.
Be careful to clean all the spaces, and especially places where the metal has been soldered or welded.