They can be polished and clear coated, but that problem could reoccur depending on how the car is stored. Chroming is your best permanent option, or you can be a cheap a$$ like me and have it powder coated. The powder coat "chrome" that was used ended up looking more silver paint than their example when it was complete, but it's plenty durable. Maybe there are better powder coaters than the one I used who could get a better chromed look.