Congrats on the new-to-you pool. I'm chiming in to 2nd the great thoughts from this last post- That's exactly what happened with our pool, and the results were pretty incredible! We didn't even have any tiles fall off, but tiny hairline cracks (barely visible) under the coping caused all kinds of other problems. If you have a working over-fill waste line, you might be safe from bigger issues (it turns out ours was blocked so the pool could fill up to the coping causing more leaks!). Either way posting pics will help folks here understand what your working with and advise accordingly. There are some very generous & helpful people here who will help you through.