Instructables

Step 7: Buff up.

Picture of Buff up.
Buff up using emery paper.

I used mild steel and I like things to get a nice patina, especially when they are handled often so I just gave it a small squirt of furniture polish that contains wax;  if you want to keep it shiny then a quick spray with a can of clear lacquer might be a good idea; but I don't think that it is really necessary.