You can anodize it, but it would be quite a bit of work. Anodizing is not like powder-coating, it's a much different process. You have to strip everything off the frame, all the parts, bushings, fittings...everything. Then you have to dip the frame in acid baths to strip all the old finish off and use more acid baths with a power source to start the anodizing process. After that, it goes into a dye bath to get it to the color you want. It can be done, but it won't be easy. Powdercoating may be easier and cheaper. Anodizing will give you a very clean, VERY durable finish, but you also need to be able to fully submerse your frame in the acid baths. Just some info...