Swimming pool resurfacing removes stains and mildew build-up from a swimming pool. Unlike acid washing, which uses muriatic acid to remove stains from the pool floor, swimming pool resurfacing is more complex and laborious.

Emptying the pool is the first step to swimming pool resurfacing.  Once the pool is empty, the surface of the pool is sandblasted to remove these stains, and the existing finish on the tiles. Afterwards, primer coating is applied to the tiles, which serves as reinforcement. Several layers of coating are applied for further protection. Finally, the pool is refilled and ready for swimmers once again.

Removing stains from swimming pool tiles through acid washing or swimming pool resurfacing should be done regularly for both hygienic and aesthetic purposes. Different factors cause staining. These include low pH levels, total alkalinity, dissolved solids, and calcium hardness in the pool. High levels of metals such as copper, iron, and magnesium also cause stains in swimming pool tile. Stains can reduce the appeal of a pool to potential swimmers, and may leave each swimmer with an infection as well.

Concrete pools re-plastered

Aside from acid washing and swimming pool resurfacing, pool re-plastering removes stains and cracks from swimming pool tiles. This method is for any type of pool – fiberglass or concrete pools, they can still be re-plastered. White plaster is the most commonly used material for re-plastering. It is easy to find and can last for 15 to 20 years.

It is actually quite simple to have concrete pools re-plastered. The pool is first drained and then etched with acid several times. This process reduces plaster layers on the swimming pool floor.  Once the etching is done, the old plaster is then chipped away to provide enough space for two new coats of plaster. After the application of these two new layers called the scratch coat, edges are then smoothened, leading to a fine smooth coat. To effectively have a concrete pool re-plastered, a final coat should be applied to give the floor a smoother and stain-free look. Once the final coat has been applied, the pool must be refilled immediately, to make the coatings more effective. Failure to refill the pool after the application of the last coating may result in damage to pool flooring, such as cracks in the tiles or weaker concrete.

When this whole process is done, floating plaster dust will appear the day after a concrete pool has been re-plastered. This are cleaned with a pool's filtration system. This cleaning period is a small price to pay for a beautiful revived pool.

There are dozens of companies that offer this service. Companies such as the Wilshire Pool Plastering Company, Walt's Pool Service, and Alpha Pool Plastering Company Inc. - all of which are located in Los Angeles, California – offer pool re-plastering.