Cleaning a rusty tailpipe

[cyclocross]

You also can try "Barkeeper's (or Bartender's) Helper". It is a mild abrasive. It cleaned up my car's muffler and tailpipe, even removed baked on oil. Nice shiny finish. I'd advise to use rubber gloves as it contains oxalic acid. I bought a can at the local supermarket. You can use cold water and a wash cloth. A power tool is not required.