Love this forum! So much good information!!!
I have a question... I need to apologize in advance as this may sound bonkers and naive! Here is my situation... I let my water level in my pool drop over these last 5 months ... As the water level dropped, the thin (maybe 1/8") layer of white plaster dried up and started to completely peel off exposing a gray aggregate which I assumed was the gunite. I had a contractor come out to have a look and give me an estimate for a replaster. He took one look at my pool and said " I have never seen anything like this before!" He was referring to the paper thin white plaster. He said the newly exposed gray aggregate underneath is not gunite, but also plaster (which other than being a bit of a rough texture appears to be in good condition). I then asked him if I could just peel off the rest of this white plaster (which comes off effortlessly) , clean it up and fill the pool back up, as the gray "plaster" underneath appears to be in good condition. At this point he said no, it is shot. But why? The rough texture? Can it be sanded smooth? Of course this gentleman is the expert, not me... but I do realized he would like to sell me the plaster job. I would not mind saving the $7500 if it would be possible to just save the gray plaster underneath.
I am not really sure what to make of this ... Attached is a photo. Can anyone offer any of your insight? Thanks!!!