For general polishing? I like the S100. If chrome - or any other metal - is really tarnished? Nevr Dull wadding has done the job for decades. And, yes; that's the correct spelling... Simichrome? I don't use it much any more, since it's kind of messy and... icky. But, back when motorcycle exhaust headers used to get blued from the heat? Nothing worked as well on that as Simichrome...