it seems like everyone has probs getting old tire gel and glaze off their tires, or dealing with tire browning. the only way to actually get the tires back to the way they were when they were new is scrubbing them with ajax or comet. i promise you that there is nothing on the market that will give you the results this will. i learned this from an old school detailer and its never failed me. white walls/letters turn out looking amazing. hope this helps someone out.