ArdraF said:I like the Dow Bathroom Cleaner foam spray. If you spray it and let it sit a bit then wipe it up that should help. If there is discoloration it's amazing what a chunk of cut lemon will do. I rub a piece across our kitchen sink (Corian) and it does a pretty good job on coffee stains for example. In any case you don't want to use an abrasive cleaner that will scratch the surface and make it worse.
Gary RV_Wizard said:You might also try a car polish, maybe one of those intended to remove light oxidation or swirls. That gives some abrasiveness without the danger of deep scratching.