However, there are times when refinishing is still worth considering. For example, if you you already have a tub, have an unusual clawfoot tub, your bathtub is installed and you do not want to remove it, etc.
If this is the case, there are a number of refinishers you can contact including PermaGlaze, Miracle Method, and Unique Refinishers. For the do-it-yourselfer, try Zap Restorer.
PLEASE NOTE: I have never personally used these products and am not endorsing them. I just want to let you know that these services exist and how to contact them.
Before paying to have your tub refinished you should, of course, take the time to find out about the company. If they are refinishing the tub in place, let them know BEFORE they start that you will carefully inspect the room for over spray when the job is done. Check their references and make certain you review their work before making a final payment. Get a written copy of their warranty and find out if the main company will honor warranty claims if the local franchise goes out of business. Finally, make certain you follow their care instructions - harsh chemicals will destroy the refinishing and most likely void your warranty.