They over dig pools down there, then form pool and shoot against a steel backed paper called steeltex.
They do feed the hose through the wall while shooting, and remove and fill in hole when done. Your pool should be fine.
an example around 6min mark: Shotcrete Pool Marathon FL 6 9 11 - YouTube
check the head float(big white thingy on the back/top near hose) it's what gives it balance.
take it off by pulling back while unscrewing it. Shake it. If there's water in it, throw it away and get another. Also make sure the back is empty.
- - - Updated - - -
also check the teeth on the...
When you say respray, are you talking about the texture? Because you shouldn't be doing that often, or at all once it's sprayed and troweled.
Or are you talking about the acrylic stain that's the color? True you may have to roll on a new coat of sealer every few years as the colors do fade.