The walls of some above ground and some inground vinyl liner pool kits are made of aluminum.
Esther Williams extruded aluminum slats!!!!!!!!! Will outlast any other wall system.
Probably not without draining the pool. You need a pro to come in and evaluate. Many times they are not even fixable, particularly if the pool walls are deformed. Just cant push the dirt back easily.
A light acid wash should remove the chalk.
inground pools hold the heat better as the ground naturally acts as an insulator above ground pools have more area to loose heat eg side walls
Two of the most prominent dangers of draining an inground pool are ground water causing the pool to pop out and the weight of the dirt being too much for the concrete walls causing a collapse.
I didn't know that there were swimming metal walls.
call a plasterer and plumber
the concrete should be 6" according to this site http://www.de-fontenay.com/poolcon4.htm
An empty aluminum can is very easy to bend or crush. A full aluminum can cannot be bent or crushed because of the liquid and pressurized gas inside that makes the thin walls rigid.