I have used the S100 products before, they all work very well, but they are very expensive (around here anyway).
I was given a tip to use good old 'supermarket available' (cheap) "CIF Stainless Steel sink cleaner" it works well for me..
I also have the stuff from MSW (manufacturers of the wire wheels) but that is expensive and you get loads of rinse but smaller quantity of cleaner and they don't sell it separately.
