good job with the polishing......turned out pretty nice with the method your doing. the key is time. you could cut your time pretty good by buying a little 5hp buffing wheel. something that would sit on your shop bench. you wouldnt need to go higher then 600 grit if you are using a buffing wheel. by doing this you would really cut your labor time down. if i was doing it, this project would be done in an hour or less. keep in mind that aluminum wont shine like chrome plating but will look pretty close. keep up the work. also look into cartridge rolls for your dremel to get in the "nooks and crannies".