Hi all Just re tiling a bathroom for a customer and they asked if i knew how to get the limescale off the bath. Basically the shower head has been dripping, the drips have splashed up the sides of the bath and then run down to the plug. So on that part of the bath it looks kinda dirty but its a thin layer of limescale. They said they have used one of the sprays you get from the supermarkets with no joy. Is there anything you can recommend? As its a plastic bath dont want to use anything abrasive. Help!