Installation artist Alex Schweder created spit skin in 2006.

“this installation of licked together biodegradable packing peanuts contorts, deforms, and melts when it contacts water.  Located in a subterranean bathroom at the American Academy in Rome, this saliva stuck skin served as a map of moisture exchange between  leaky walls and the leaky bodies that occupied them.  The shriveling and shrinking architectural performance for the camera questions the role of the recording and the object in our subjective perception of space.“

More on the piece here

He recently finished a residency down in Marfa Texas at Chinati, Donald Judd’s foundation. There is some really great work down there.