do ketchup, on RG leewei has a thread on the ketchup trick and many opinions on there as well
Why are people averse to using Brasso?
I think that it would be the muriatic acid (HCl) in the pool water doing the business, not the free chlorine. It's a similar proton source to the acetic acid in lemon juice or ketchup. I just think that it's best to use the proper product for cleaning fine metals instead of kludges. But that's just me.