The Hogwarts Express is a train that runs between London and Hogsmeade. It is used by the students and more rarely by the teachers of the Hogwarts School of Witchcraft and Wizardry.
3 sheets of metal

The stormtroopers are the elite shock troops/space marines of the Galactic Empire, under the leadership of Emperor Palpatine and his commanders, most notably Darth Vader and Grand Moff Tarkin.
2.5 sheets of metal