The pedestal on our new sink wasn't suitable for our plumbing - so we got our hands on a suitable old pedestal from a salvage warehouse... It was fine, but a little mossy and dirty, so I gave it a good scrub. I then rinsed it off in the old aluminium sink - only to discover that the aluminium had left little scratch marks on the surface... I tried to shift them with Cif, but to no avail. Does anyone have any suggestions?