bleche wite is staggeringly effective stuff. i dilute it 1 part per 25 parts water for use as a household cleaner. i've used it to dissolve the flaking chrome off a dr. grabow viking, followed by paint stripper for the undercoar, to reveal a natural aluminum finish.
it will also completely dissolve the finish off chromed plastic in about 2min flat. i did this to a worn twist pipe (plain plastic version of merton's super twist).
this is with the original formula, which i still have bottles in stock. no idea what the new formulation is like.