They are plastic. They are part of the airbag. They are cheaply made and peel. They cant be polished. They cant be replaced on their own. There is no solution. The world is ending.....
Seriously, its happenong on my wifes r, but never did on my r. Seems to be sluck, some peel, some dont. Only thing i could think of is to finish scraping off the chrome and carefully painting it (nickel silver or matte black? Dont know...). Not sure what to do, but its not an individually replaceable part, its. Not warrantied, and its an embarrasment to the brand....