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Over time, a pool’s surface can become rough, due to chemical erosion and ordinary wear and tear. One way to spruce up a pool surface is by painting or even resurfacing with another material. But in order to be sure that the paint, epoxy or other resurfacing materials will adhere to the old surface, sandblasting is often recommended.

In this process, the old surface is made even rougher, allowing the new material to bond with it, creating a firm seal.

With sandblasting, an abrasive material — like crushed glass, steel grit, aluminum oxide or walnut shell — is sprayed onto the surface. First the pool is drained and allowed to dry. Because this process can damage metals, glass and plastic, it’s important to remove or tightly cover ladders, lights, drains, skimmers and drain covers. In addition, vulnerable surfaces that should be not be sandblasted, like tiles, should also be protected. Protective gear should be worn to prevent injury.

The abrasive material is applied using a hose and tank. To insure an even distribution, the hose is swept across the surface, about two feet from and at a 90-degree angle to the sides. The resulting debris can be removed with a vacuum and broom. Then the surfaces should be washed carefully, before applying paint or resurfacing products.