Re: Patina question
I find that a small stainless steel brush does wonders at cleaning up rusty chrome. The stainless wires are softer than chrome and you can scrub quite aggressive on chrome without scratching. The rust that won't clean off can be touched up with aluminum paint sprayed on a q-tip and then use the q-tip to apply it to the rust spots.
I would also recomend occasionaly spraying down the bike with WD and a wipedown. That's how I clean all my motorcycles and bikes if they aren't real dirty. Just be sure and keep it off the brakes and tires.