VG, not a daft question. Depending on what was decided, they'll use MXP or MUC for Ferrari. Again, FOM have a large say into which airports are used; MUC is (or was) on the "very good" list - I've been out of euro scene for a few years now.
Ferrari would fly on an Italian aircraft. Or a foreign one with an AZ call-sign. I've seen Atlas @ MUC in AZ colors for Ferrari (yes yes, I know 5-6 years ago).