Realcent.org

I sold bars at a coin shop last weekend. He picked through the pile and rejected all the toned bars. Said they were ugly and his customers wouldn't want them.

What is the consensus on cleaning them?

I would use the hot water, aluminium foil, and baking soda trick to take off the tarnish.

Comments? Suggestions?

I guess its not like a coin so should be ok to get all nice and pretty

I can just imagine PCGS/NGC getting into slabbing silver bars. You send one in and it comes back marked "Genuine- Improperly Cleaned." Now that would blow me away!

If you want a more consistent appearance with less work and don't mind spending 5-6 bucks, go with tarn-x, available on your local cleaning supplies aisle.