  Certain classes of 3-manifolds, following Thurston, give rise to a 'skinning
map', a self-map of the Teichm\"{u}ller space of the boundary. This paper
examines the skinning map of a 3-manifold M, a genus-2 handlebody with two
rank-1 cusps. We exploit an orientation-reversing isometry of M to conclude
that the skinning map associated to M sends a specified path to itself, and use
estimates on extremal length functions to show non-monotonicity and the
existence of a critical point. A family of finite covers of M produces examples
of non-immersion skinning maps on the Teichm\"{u}ller spaces of surfaces in
each even genus, and with either 4 or 6 punctures.
