[jerryhawthorne]

First step is a good cleaning of the old finish. Most use GoJo in the cream form. NOT the one with pumice in it. Clean well and rinse off with a damp towel. This will give you a good starting point, you will be amazed at how much dirt and grime it will remove.
After that, many will pitch in with various products. Howards Restore a finish works well for me. After that some wax and many have differing ideas of what to use.
You will be amazed at how nice you can get the original finish to look. Of course it depends on how bad it was to start.
Jerry