Chrome does have a tendency to oxidise, if you don't use it often. Just make sure that you wipe down the metal parts often enough, so that grime doesn't get the chance to built up on certain spots of the chrome. Over time, the moisture in the air and dirt in the grime may react with the chrome and cause it to pit.
Don't don't have to wipe it till it's showroom condition, just have to make sure that it's not too dirty. I would advise against using compounds like WD40 or metal polishes, as chrome is only a thin layer. You wouldn't want to strip it.
Nickel, on the other hand, won't pit that badly, but it tarnishes very quickly, but that's another ball game altogether.