The finish on your piano will need regular cleaning to remove dust and finger prints but someday may also require the care of an expert in piano finish to repair or completely refinish it. The complex finishes today can be a combination of any number of chemical compounds. The techniques to clean as well as repair a polished black piano are completely different than a wood finished piano or a satin black lacquer piano.
Cleaning is something you can carefully do yourself by following these instructions. Basic repairs can often be taken care of in your home by a technician but a complete refinishing of your piano requires a spray booth and weeks' worth of stripping, rubbing and polishing.