Lucy was cast in silicone, colored so that she would have dark skin like tropical humans.
The amount of body hair in australopiths is unknown. We assume that the common ancestor of chimps and humans, like all of the non-human apes, had a full coat. We can guess that this coat was lost by the time of Homo erectus, as its skeleton’s proportions show that it was adapting to heat stress like modern humans do, and part of our adaptation involves an enhanced sweat gland cooling system which would not function well with a full coat of body hair.
For Lucy, I chose a model that was at the sparsest end of the range for living chimpanzees. Because its taper, color, and straightness make black bear hair a good stand-in for chimp or gorilla fur, this is what I used for Lucy.
About a million individual hairs were punched into Lucy’s silicone skin over a period of three months (in each of her incarnations, for the Denver museum and later for the Smithsonian).