 The treated material, whatever they used, was very wet. It is dry now. It's ready to rock and roll. Well, you can use one or two things. You can use an exterior house paint. That would be self-priming. Since it is a pressure-treated wood, you know, the whole key to the success of that project is the dryness of the wood. If this were on a deck, I would recommend a solid color stain because it's going to take foot traffic.