I am having my 15 x 30 Johnny Weissmuller pool installed as I type. It is extruded aluminum. I was confused as which to get also - steel or aluminum. Pool stores didn't seem to be any help whatsoever because obviously, each pool store is going to put down the others product although neither seemed to promote the resin for some reason. Maybe it was the cold Michigan winters....?

Personally, I work in the steel business (bars, not sheet) but know first hand just how easy it is to develop a rust problem with bare steel. So I went with aluminum - nothing scientific - just a personal choice. The pool I bought comes with a 40 year warranty so I felt OK in my decision.

Kevin