There are three airports around Milano. If possible use Linate, the closest to Politecnico.
PoliFAB can be reached from Centrale Railway Station by subway. Take the Line 2 (green) of the underground in the Gobba/Gessate/Cologno direction ad drop off at Piola station, then follow the indication on the map. Estimated required time is about 15 mins.
For info on travel and subsistence reimbursement procedures, please get in contact with Margaret Costa from INL, Braga, Portugal (margaret.costa@inl.int).