This pressure treated railing was dried out and the acrylic stain that was on it had failed plus the wood warped. I remove the old layer of stain with my in fared paint remover then oiled the wood with raw organic linseed oil and finished it with linseed oil varnished. over a year later it still looks great. The longevity of this finish is well over ten years!! Unheard of in direct sunlight.