Interesting thread. I'm enjoying your Bianchi saga. Back in the racing days, my best friend and club mate had a copper colored Bianchi (Specialissima?) and I was jealous of him as I rode my Legnano Roma Olympiade. I still have the Legnano, but have always had Bianchi envy. I had a red 90s Forza that got killed by a car but that's another story.
Anyway, great job on the chrome. I recently acquired a barn find $50 Legnano Gran Premio with chrome issues. I tried the crumpled foil trick, with Turtlewax white chrome polish, and it worked amazingly well. I did a quick cleanup for the $100 clunker challenge, but need to do some in depth cleaning and upgrades, now that price is no object. 😉 The chrome lugs are really bad, and not even the foil seems to help them come back.
Here's a couple of "before" and "after" foil polish pics. Looks like you have yours all figured out - nice job, but thought I'd pass this along. I love your Bianchi, but once a Legnano guy, always a Legnano guy, I guess.
Crank as received, steel center, aluminum rings. I haven't attempted to service the BB yet. My first cottered crank.😱
Following foil/Turtlewax polish.
Derailleur and chrome dropouts as received.
After ...
It did wonders on the brass head badge too. Not sure about the Olmo head set, but it cleaned up nice.