You can have annodizing any colour you want. I am still a bit confused about clear annodizing though because ive spoken to some annodizers and they say 'no' there is no such thing as clear annodizing, it is just silver but it depends on the shade of silver, the level of polishing and how thick the coat is that gives the appearance of a 'clear look' but then when you speak to others they say there is clear annodizing?. There are some good websites out there that exlpain the process and finishes though if you goodle it. I found one site a while back that explained how to do it yourself. It didnt look too hard to do if you had the space to set up all the different containers of solutions required.
Hi - mirror like finishing doesnt look right on most Japanese dirt bikes and can look tacky, too bling or Harley like unless that was the original finsh on the bike eg or on British bike engine side covers. i will admit it does look pretty cool to have mirror like finishes on alloy but i just wouldnt personally do it on a jap dirt bike if it wasnt like that originally.