Nitromors will only take paint off. It won't strip anodised stuff.
You will need something else to strip your rim but I can't remember what it is called. There have been threads about it before so you could probably find what i'm on about with a quick search. Or someone else may tell you first...
EDIT: I just did a quick search for you and it's caustic soda you will need. But read the instructions well, do some research on it and be very carefull with it if you choose to di it as I also read that It's really nasty stuff.