[REDCART]

I would think in addition to salt air, how you clean acrylic would make a difference too. For one thing, any thing with ammonia, like Windex would over time make acrylic cloudy. All of the banks in the NYC metro area have clear acrylic dividers and they don't seem to discolor or cloud up. But you have to wonder why the price difference between acrylic and glass. Is it because there's little or no competition? They may be using tinted safety glass but it's probably not insulated. Must be in the fabrication process. Acrylic can be cut to size locally, whereas glass must be ordered and there's no room for error.