getting ready to build some paneled wainscoting in a small powder room remodel. This will be painted but I still want clear stock. Considered several sources of clear wood for this including poplar and pine. Also ripping either plywood or even MDF. At the borg today I notice they had some "appearance grade" pressure treated stock in various widths. Totally clear, it was much cheaper than any other stock they had including the warped white wood stock available. I was shocked at the price. It didn't seem real wet and was a brown color, not green, and was straight and flat. Is there a reason PT wood isn't advisable for indoor use even painted?