We bought this house 3 years ago. It came with an old IG pool, about 15x31, we were told the liner was less than 5yrs old.
Here's a pic:
You can see the tall arborvited alongside the pool, a combination of those trees and a 60ft fat pine tree (removed as soon as we moved in) blocked most sun from ever reaching the pool, and dropped endless amounts of pollen, sap and pine cones. So I cut down 6 of the arborvite and replaced the chainlnik fence with a vinyl privacy fence. We unexpectedly picked up an extra 10 feet of usable space.
You can see the wood decking is badly warped and nearly as old as the pool. The wood is a few inches above the coping, so we're able to see the metal wall of the pool and it traps moisture that rusts the metal. Removal the wood was a difficult job and it took awhile to find best method. Ended up being the circular saw and prybar.
The rust was pretty bad in a few spots, but the rest of the wall is still strong. We were told by a pool company that we'd be able to install coping onto the metal. The condition wasn't too bad.
We're also getting the plumbing re-done, and we'll then pour concrete decking. Not sure if we'll keep the same liner receptor or install a liner-receptive coping so when we do the liner in a few years we can then attach to the higher coping attached to the concrete? Or do we just get a coping maybe covers a little more, but can't receive a liner. Our pool guy is going to get us some samples so we can see, but does anyone here have experience with something similar?