About eight years ago I had a chrome head set start to go, showing the dreaded signs of rust percolating up from under the surface. I rubbed it all off with a WD-40 soaked rag, just because it was handy and the only thing on the work bench at the time. It removed the rust quite easily and shined the heck out of the chrome. I never applied any polish or wax and decided to just keep a close eye on it. The rust has never reappeared. I find that very unusual and surprising.