Bicycle related object here.
I like my new rain chain. I want a more aged look though.
I've applied a mixture of hydrogen peroxide, vinegar, and salt to it and it darkened up the chain nicely. It actually made the galvanized smash links look bleached, I think they'll rust.
The aluminum chainring became a lovely gray. The piece of a Shimano cog got dark but no corrosion if that makes sense. The other two Miche cogs, look brand new.
It's interesting. It'll be fun to observe the changes through the winter.