Great looking stem! I have always liked the looks of the few polished alu stems that are out there. I would leave it like it is if the color works ok with the bike its going on.
well.. alu bolts works, depending on the quality of alu you use ofcourse.
Alu bolts on a stem......I think not. Only on the steerer clamp if at all. I think you would be hard pressed to find anyone here that uses alu on the face plate!
Actually i use aluminium bolts on the face plate as it is a 4 bolt design and i will never use aluminium bolts on the steerer clamp as that is the most dangerous bit to do. (i was this close in buying a new stem)
Reason is because when you tighten both aluminium bolts on the steerer clamp it is fine. BUT when you release the tension on the top bolt, the area where the stem meets at the end expands and puts alot of pressure on the last aluminium bolt and BANG, the bolt breaks!
After my incident, i had to use my drill to make a 1mm thread on the remaining bolt to get it out.
Anyway this is just a warning and i will second the idea with using ti bolts instead of aluminium. However, with 4 bolt design face plate my stem held up for a year now but i did use loctite 222 on the threads.