clean the rims , use an abrasive solutin and polish the rims with a grynder . after you obtain the shy effect , spray some "clear paint"(i don't know how it say's in english) for protection . good luck
IME (and my RAAF father's) Turtlewax. Makes a sheet of ally come up like a mirror. Not sure what product it is, but it comes/used to come in a green bottle/