I saw this over in the Road forum. This guy uses Marks-a-lot markers and an oven to make a black finish over anodized aluminum.

http://www.bikeforums.net/showthread...=366084&page=2 Starts at #37 for the process/results. Refer to http://www.bikeforums.net/showpost.p...1&postcount=18 for the baking process.