I replaced my old kitchen sink last year and it looked very nice, until last month I scratched it - my daughter had cooked something with dough and left some blobs in the sink till I found them hours later, and you know what happens to flour and water... I had to sort of chip them off, and wasn't careful enough.

I have googled around and the ideas I have so far are: a solution of 1/2 lemon juice and 1/2 baking soda; copper cleaner; Brasso; and car polishing compound of which I happen to have a can.

Does anyone have any suggestions? The scratches are not deep or widespread, and therefore of course to me they stand out even more.