Not everybody has the ability nor can afford to do the full media blasting, Soda or otherwise. So, using a product like Rub'N'Buff makes a lot of sense. Especially on things like wheels and engine casings. I have a small media blasting cabinet that I use 3 different grades of glass beads in. It works great to get rid of all the staining and dicolourations, but once finished, I will sometimes use the pewter Rub'n'Buff on a part to give it a little bit of brightness and to give it some protection. It is easy and works. I really like it on snowflake wheels.