Ok, maybe not amazing, but I had never heard of it.
A friend entrusted me with a 1960's era bike to restore.
Very little seems original on the bike except for the condorino handle bars.
Anyway. On to the topic. The rims and all the chrome were fairly rusted. Not wanting to spend alot of money on chemicals, I searched online and found a method of aluminum foil and baking soda.
It seemed strange, but doable without risk. I tried, and.... knock me over with a feather, it worked quite well.
Now, I want to offer my rust removal services for a fee