The plaster is pitting and in poor condition, but I seriously doubt that the plaster is 70 years old or even 50 years old.
If it really is that old, be careful when removing it because it might contain asbestos.
You can have it drained and replastered, acid washed or even sanded using power sanders and diamond grit sanding pads.
Acid washing will make it feel like sandpaper, which will cut and scrape skin on hands, feet etc.
Sanding after acid washing helps smooth it out.
If the plaster is delaminating, then it is best to remove all of the plaster and replaster.
Typically, you need to consider doing tile, coping and decking at the same time, which turns it into a major and expensive remodel/renovation.
Make sure that it is safe to drain before draining.
Pools can float if drained during high water in the ground times even if the hydrostat is open or removed.
If it really is that old, be careful when removing it because it might contain asbestos.
You can have it drained and replastered, acid washed or even sanded using power sanders and diamond grit sanding pads.
Acid washing will make it feel like sandpaper, which will cut and scrape skin on hands, feet etc.
Sanding after acid washing helps smooth it out.
If the plaster is delaminating, then it is best to remove all of the plaster and replaster.
Typically, you need to consider doing tile, coping and decking at the same time, which turns it into a major and expensive remodel/renovation.
Make sure that it is safe to drain before draining.
Pools can float if drained during high water in the ground times even if the hydrostat is open or removed.
