With help from this site, and with an hour or two every other weekend, I finally completed a build-up of a single-speed mountain bike. Everything seems to work fine (though the Singleator does not inspire long term confidence) except that a new issue occurred to me. To keep the bike relatively cheap, I bought from Ebay an unpainted aluminum frame from Derby overstock. Even though I put good parts on the frame, I know you get what you pay for and so don't expect miracles from the bike long term. But the frame is not only unpainted, it appears to be entirely untreated (has a matte grayish/silver) finish. I think it looks fine and would prefer to do absolutely nothing to it, but wonder whether it will corrode. And if it will, I wonder what I should do. Should I wax it? If so, what kind of wax? Thanks in advance.