Invited to develop a project for the outside of a train on the Sintra urban line, which took the form of a thin vinyl film applied over an extension of four carriages, Didier Fiúza Faustino (Chennevières-sur-Marne, 1968) examines an analogy between the bodies’ skin, a surface of contact and communication with the world, and that of the train, a surface of contact and connection with the territory through which it travels.