The second half of the eighteenth century brought changes in attitudes towards shaping the body. New expectations of polite conduct, deportment and demeanor were projected onto the body, with emphasis laid upon neatness, elegance and a 'natural' body shape. Deformities were to be concealed, whilst bodily surfaces were to be managed to convey a harmonious whole. Many devices were involved in this process, including wooden legs, elastic trusses, and even wigs, but the introduction of cast steel around 1750, offered new material possibilities for shaping the body. The physical properties of steel transformed the design and function of many instruments, from postural devices to spectacles, and even the smallest daily items of toilette. By no means was steel the only material involved in transforming the body. Neither did its introduction sweep away all that had gone before. But, as an 'enlightened metal', it was a key material in the refinement of the body.