My apologies, but I am new to pool care. I am trying to figure out what's going on with this pool's surface. I know it needs to be replastered, but I'm wondering what I'm looking at. It looks almost like there's a rough layer with a concrete-type appearance and plaster over it, and these areas are where the plaster was worn away. I know that not what's really happening because there are places where the plaster is flaking off and it's lilly white underneath.
Shot showing side of pool and bottom
Closer shot of bottom
Thanks for any insight.