We are planning on putting a used above ground pool inground on one side in our sloped yard. We are planning to coat the whole thing in rustoleum and then the outside in roof coating. It's not going to last forever but, later it will be replaced with a resin pool. I only gave $150 for it. It's getting stainless screws , pvc piping and a new liner.We are doing wall foam,cove, and something on the bottom not sure what. Can anyone think of anything we need to do we've forgotten? Would building a retaining wall on the buried side make it last longer ? We are bringing old castle portage stones flush on that one side for a patio. The other sides will have nothing there.