I am going to have a Martha moment. Most of you know about this amazingness in a bottle but I want to point out another use for this. Not only does it do wonders on sinks, bathtubs, tea kettles, etc... I used this on my oxidized silver necklaces and rings last night. UH-MAZING. Especially the old Tiffany & Co stuff that I will not pay to touch up. I just used an unused sponge, made the powder into a paste and delicately ran through the necklaces. Make sure to rinse it off after.
You can find it anywhere, the cheapest place is of course the $.99 store. Love it.