This stainless steel material is the best I have found, with WD-40 it seems to just scrape off the rust without affecting the bluing. Can even put pressure on it to get tuffer spots. Have used 0000 steel wool and it works but not quite as effectively or easily. It’s looks like it would be coarse, kind of counter-intuitive, but just works like a charm, slides harmlessly across surface.. Have no idea if it’s sold in UK.