Unless I can somehow get a hold of PVC sheets for cheap, I will continue to build all my racks and cages out of oak plywood, with waterproof paint. Still way cheaper than buying commercially made stuff. And it will last forever!!! ¾" oak finish plywood is very expensive though. I would love to find a way to get PVC sheets without the crazy shipping, simply because it is lighter and easier to clean and 100% waterproof without primer or paint.