It's a lease so I wouldn't put that type of money into a car. That said a black car is hard to keep clean ceramic would help tremendously. I ceramic coated my entire car and ppf'd the front end and rocker panels, that would be the way to go.
XPEL PPF, paint correction and CQuartz Finest Reserve
https://f90.bimmerpost.com/forums/sh....php?t=1615408