I have calcium scaling on my pool, and while the water level is low (separate issue) I want to get rid of the visible part above the waterline. I tried hydrochloric acid, but it didn't budge it, so I understand it's calcium silicate. Sandpaper seems to work, but I'm worried about damage.
I got some 240 grit pads for the detail sander, but one pad wore out very quickly. I worry that if I use a coarser one it will damage the pool.
My question: is 120 grit on a detail sander going to be OK to use on the walls of the pool?
Secondary question: if I do a test and it feels smooth, will that be enough to know that it won't do damage?
I got some 240 grit pads for the detail sander, but one pad wore out very quickly. I worry that if I use a coarser one it will damage the pool.
My question: is 120 grit on a detail sander going to be OK to use on the walls of the pool?
Secondary question: if I do a test and it feels smooth, will that be enough to know that it won't do damage?