Freaky the frame has the original Nickel but to get it as nice as I did took a solid week of buffing with an electric drill mounted 6'' buffing wheel I got from Bunnings. The kits cost just under or around 40 bucks and include a 6" buffer, a 2" one for tight corners and two cakes of buffing compound. The key is to go over the really rusty or corroded bits with a stainless wire wheel mounted in the drill chuck to get the nickel reasonably clean of corrosion. Then starts the tedious task of using the 6'' buffer and the dark coloured buffing compound that comes with the kit. After you've got the frame to a shine you're happy with, apply Auto Sol to the entire frame and let it dry, then either polish it with a rag buffer in your drill or polish it by hand with terry cloth. Then as a final touch, give it a good hand polish with Brite Shine cotton wool polish. I did the tank,side panels and rims the same way.
As an experiment, I polished a couple of tubes of my old basket case Hindall using the same method and it looks as if it'll come up nearly as well. This frame is really, really corroded but it looks like it may turn out pretty good. If I get a chance I may do a Ji Gantor style 'Polishing for Dummies' thread over the weekend.