The home we bought, uncaged outdoor pool was resurfaced with pebble-tech about 5 years ago. The cement coping was replaced with travertine, which I don't believe was sealed but unsure, or maybe it was just poor quality travertine. It always looks dirty, some tiles are pitted and moldy. I tried using gentle power washing without much help. My husband tells me to just ignore it, but it irritates me. I would like something with a cleaner, brighter look. Options? Cement, epoxy? Anything new out there I haven't seen? BTW - the tiles used for the coping are thicker and harder but not more of a tan color. The pavers they used are more porous ( I understand it's the nature of travertine?). They are set in sand. Sloppy job in my opinion. What would be better for a cleaner, look?