Reading through numerous posts, wondering if someone might be able to help me out. I had my pool replastered 5 months ago. Within a month I noticed grey mottling on the sides and on the floor of the pool. I was trying to figure out if it was scaling or not, but I have come to the conclusion that it was a result hard troweling. It was in the upper 90s (North Texas) when the plaster was applied and the guys were trying to get the pool done before it rained.
I purchased a calcium eraser from the store, when I used it on the spots on the wall, it created a cloud of white dust. Thoughts? Is this a result of hard troweling? What can I do other than sanding down all of it? I have read that acid washes don't seem to help with this issue.