Hi.
I've done some polishing. I've made from sponge something like polishing disc to my Proxxon drill and tried to achieve some high shine with red, blue and white Tamiya compounds. Next time I won't use red one, because in some places I've rubbed to plastic.
I've dry fitted Hobby Design photoetched brake discs. It doesn't look bad for me. I'll put on callipers last layer of yellow gloss and burnish brake discs with sandpaper. I had put some chrome on nuts, but not sure if this is visible at all.
Cheers, Adam