I discovered that Wal*Mart also carries Barkeeper's Friend.
I've always thought that it's really great stuff,
Martin!
It will even take the rust off of chrome.
You can use it to clean Corian counter tops, glass stove tops, etc.
It's sort of to plastics and glass what WD40 is to rusted nuts and bolts ... another "magic potion" ... Don't you just love magic potions that work? ...

All the best,
Richard