I've heard that coca cola works....In the UK there are many lime busting gels in the market. All depends on whether it's due to lime or stains.
How old is the pan? Is the glaze damaged at all?

Head count today: 2 builders, making a doorstep
2 joiners, finishing the plaster board.
Intermittently, 3-4 labourers, doing what's necessary.
Plasterer still to arrive. It's 9.20 am, and they've all been here over an hour.

Rang a guy who spray paints onto new plaster, and he's coming for a look sometime tomorrow. I am picking up the mixer shower for over the bath, and I am under orders from the boss to choose tiles for the bathrooms. I can't believe I am onto choosing colour schemes when there are not even any doors yet!

Andrea