CarlD - I'm not sure if he did the vermiculate originally or not. I doubt it. We aren't the original owners. I suspect the vermiculite is broken down from the leaks and the abuse of thousands of crashes into the bottom of the pool by the kids. I'm not really sure though.

Watermom -- they started out spraying Rustoleum cold galvanizing compound, but they think a few areas need more than that, thus the need for foam.

thanks for the input.