Plaster is not intended to be a slick finish. It is designed to provide you with a non-slip, long lasting pool interior.
A plaster finish is not perfect or flawless. You will be able to see some indications of its “hand troweled” workmanship. The plaster mix normally has some small speck of other colors.
An underwater light will magnify the trowel marks and cast shadow, giving the bottom a “wavy” appearance; this is a normal effect on all plastered pools.
It is normal for some small “check cracks” to appear in the plaster surface. These do not represent any deterioration in the integrity of the plaster nor will they cause any water leakage.
Your plaster surface may naturally have some “streaks” or “blotches,” A perfect; uniform all white surface cannot be obtained with plaster. It is also normal for some mild discoloration to appear in parts of the pool as it ages. A mild acid wash of the plaster surface will generally remove most discoloration and stains that may build up over time.
Never drain your pool without professional supervision. The drying effect of air and sun can cause extensive damage to the plaster.
Likewise, your pool is subject to extensive damage due to “floating” any time your pool is drained.