When laying new tiles, a thin-set is used. It bonds the tile to suitable substrates. Thin-set will not adhere to painted surfaces or other non-porous surfaces.
It is also necessary to know how to properly resurface a swimming pool. If you don't have the necessary know-how, it can be dangerous and labor-intensive. It's possible for many things to go wrong that could cause you to redo the entire job.
Concrete decks are often found around swimming pools. They can be just as susceptible to wear as the pool itself. Resurfacing a concrete deck costs on average $10 per square foot.