There are several ways to tell that it is time to replaster your pool. In some cases, people choose to replaster their pools purely for looks. Sometimes, plaster can get stained beyond the possibility of cleaning causing some pool owners to replaster their pool. Other times, plaster can be rough in certain areas of a pool causing discomfort to the touch and providing rubble a hiding place. This can be fixed by replastering certain parts of the pool. The more serious reason for replastering a pool has to do with the way plaster protects the skeleton of the pool from the pool water. If the plaster is wearing off in areas and the granite underneath is showing, this proves to be a structural problem. If the damage is minor, it is possible to patch it up. However, if the damage is more extensive, it is probably a good idea to replaster the entire pool. Replastering an entire pool is complicated and should be done by a professional. If done by an amateur, the plaster can appear lumpy and rough or even crack. Enlisting the help of a professional will ensure the results are pleasing to the eye and are structurally sound.