I am not sure if X90 will agree with me or not---but when I cleaned mine I found some aluminum cleaner in a bottle that really did wonders for me. I used that on the dust covers for front and back dust cover parts. I am pretty sure that X90 actually bead blasted these parts that I am talking about. Also, on the rims, I took them apart, had them sandblasted and then zinc plated---but if yours are fairly clean you maybe wouldn't have to do that. The brake hubs I polished to a nice shine.
If you look at my project logs you will see how mine turned out--a lot of work but they look pretty good. Of course I don't think mine compare at all to the job X90 does.