This is a follow-up to another post I just made about installing 6" v-groove pine in a three season porch. The pine is being installed vertically. I am wondering how to handle the corners where two boards will butt up against one another. I could just leave the butt joint but I don't know if that will look very good. I could use a piece of molding to cover the joint but I'd really like to avoid that. What about mitering the corner boards?