I have single pane wood windows with storms on my house which overall are in good shape but noticed a couple of my window sills are rotted along the outside edges. I was considering epoxying them over but would rather do the full sill as they need to be freshened up anyway. Would need to start with a 2x6 board to build the sill and was wondering if I should consider using another kind of wood instead for better resistance to the elements? I was also considering using PVC board then just trim the sill angle and horns in to match. Can anyone recommend?