I use many Rio products and am satisfied with the majority,
However, I have tried Tarnish Shield in the smaller size. I'm not
convinced that it is helpful.
I, on the other hand, like TarniShield a lot! It brightens and
protects pieces, when used according to directions-- plus, it makes
pieces much more resistant to fingerprints. I use it on a LOT of my
work-- pretty much anything that isn’t blackened.