Navy Tuf Glide if you can find it.

Another trick you can do is strip all the components off the frame, then strip the frame to bare metal. Soak it in water with a little acid added, with the negative terminal of a current-limited power source hooked up to it. Hook the positive end up to a plate of nickel or zinc and let it run. The anode (positive side) will oxidize, then dissociate, float across the water, de-oxidize against the cathode, and plate it with metal.

Aluminum you can do, but make it the anode and it'll turn funny colors.