We built a new house in a farmhouse style. Its about a month old. We wanted the front porch painted gray like we saw in many pictures. Its a very well built custom home but the builder and painter here in Richmond, VA have little experience with painted porches. They used treated tongue and groove wood and have tried a few different types of paints/stains. All has pealed. They even inquired about marine paint but found that it won't work on treated wood. Any suggestions? I think they are at loss for new ideas.