What is the best steel polish and cleaner?

"Bartenders Friend" in the original powder form is hands down the the best product for polishing heavily tarnished stainless steel. I was amazed by the results and everyone I've recommended the product to agrees. I was able to remove heavy carbon and tarnish from a stainless steel barrel that appeared beyond saving as the result of a fire. Mix warm water and powder to form a paste, apply with a sponge working in the direction of the grain. Polish dry with a non-abrasive cotton terry cloth. Repeat the process until desired finish is achieved.