What is an acceptable amount of plaster mottling? We had our pool replastered 10 days ago. Before they started filling the pool I noticed some creamy beige mottling on some of the walls but thought that was normal because it was wet, fresh plaster. I was thinking it would dissipate when the pool was filled and curing over time but it's been 10 days and no better. It is basically over the whole pool (bottom and sides), might have been like that before filling pool but I'm not sure, I remember seeing it on some of the walls but thought everything looked really good. It's not terrible and only really noticeable when the water is still but there is definite mottling. Also, the pool guy who was doing our start up came the first day after filled (Thurs) and added acid. He came back two days (Sat) later and added acid, but he has been a no show since then. I took over testing and added acid on Wed and again yesterday Friday. I just added chlorine today and am going to wait to test before adding more acid. Could the erratic start up have caused this mottling or made it worse?