Quality Materials: The quality of the materials makes all the difference. Using inferior products increases the chances the finished product will peel or chip. We frequently get calls from customers who have had their tubs refinished with inferior materials. The finish is peeling or cracking. A tub that has been refinished with quality materials will last for 10 years or more if well maintained.
Workspace Preparation: Make sure your bathroom is protected from overspray. A little bit of topcoat material can get on your walls. It may not be apparent when both are white but even a little topcoat on a colored wall will stick out like a sore thumb. Also, make sure the bathroom is thoroughly ventilated. Some companies use a simple box fan stuck in a window. That just won't do. Make sure the area is ventilated with a powerful exhaust system.
Warranty: Make sure you get a warranty in writing. Companies make a lot of promises but don't always deliver. A written warranty is security you can bank on.