I am always a bit nervous about using this stuff. On my last car the cleaner was an acidic solution (wonder wheels) that ate the coating off my brake callipers. End result was some very clean, but rusty callipers. /ubbthreads/images/graemlins/burningmad.gif Does anyone have any recommendations on this? I've just used Meguiar alloy wheel cleaner for the first time & although it says nothing about being an acid solution, they way if ate through the brake dust would suggest it is. Also can you actually clean the callipers? Or do they require an acid bath and regalvinising? I am after a shiny finish & wouldnt want to paid them yellow or anything. How do porsche maintain there callipers?????