I have a rust problem. The spot is about 6 inches from the bottom of the pool and it is about 4" x 2" (almost perfectly horizontal). The spot is on the outside wall (have not removed the liner since I bought the house a couple of years ago). There are some smaller spots nearby but nothing anywhere else on any other walls that are visible. Is this something that can be repaired or am I bought into a new pool wall (essentially the same as pool replacement from what I've read)? I have read some scary pool collapse stories elsewhere and I don't have much experience with this stuff. Any help would be appreciated.