You would first need to sand through or fill the pitting from the rust (after all rust is removed by disolvers or media blasting).
The process of rechroming is pretty expensive but the chrome shop will always do one of two things for you...plate directly over the pitting, resulting in a poor-looking job or if you have the dough, many quality shops will do the repair work for you (expect to have much money). It's all a choice.
I don't smoke so I went another "NON-Concours" route...a lousy choice perhaps but it looks very nice "flocked".