Cleaning shower screen frames

[deaddei]

Not the glass, the surround- presume it's aluminium.
It's become very discoloured- we live in a very hard water area.
Any ideas???

i USE AN e-CLOTH (BLUE, FLANNEL LIKE) (oops) and it comes up abit better

cif do a stainless steel and aluminiumk cleaner plus an e cloth for the glass

Oh I'll look out for the cif one.
Thanks