Plastering the pool is the last step in the construction process. The most common pool finishes are made from a mixture of a specialty cement and Quartz. Other times, pool plaster can be a mix of white Portland cement and marble dust, with the addition of a variety of materials providing strength and ease of application. Plasterers can also add color additives to produce any shade of plaster, or use Quartz, glass or ceramic aggregate to add flecks of specific hues. Once applied, the pool must be filled with water. The plaster then requires a 30-day period of curing. The very same remarkable masons which installed both the waterline tiles and coping stones will also do the plastering.