While looking into the best paint for the surface, I learned that the wall (porous) could not hold paint (non-porous). Moisture would seep into the wall, have no way out, and the paint would peel. I paid a visit to the owner of the company that manufactures the wall surfacing. Eds Senior and Junior told me that they could mix the compound in any color I liked, and then I could paint with that. I left the shop with 30 blank color cards.