Well, I have an overlap liner and it was installed professionally. I watched and it seems that there wasn't anything on the metal. I think they put the liner in and put a long plastic clip on top of the liner to hold it in place. My pool is the same age as yours.

The one thing I do notice with my floor is that it isn't in the same position today as it was when it was first set up ... that's why I asked the question. My floor is printed and my walls are not and I definately have wall material on the floor, not everywhere but in some places.