Blu can be used to forge weaponry and armour and is very pliable. It is hard on contact with any other object but leather, so Blu Blacksmiths use leather gloves to shape it.
Blu can be used for architectural purposes also, such as building planes, skyscrapers and vehicles. It was used in part to build the Alpha Jett.
It can be used to power suits (Blu) and also cities as an alternate energy.