When I bought a piece of lr from EmilyB I thought it had a few clumps of silicone on it, but when it shed some skin and got bumpy I got suspicious:
Now it looks like this:
Man, that stuff's resilient.
(I hope I don't owe her extra now

)
PS - see the hermit crab in the first pic (bottom left tucked inside the rock), he switched shells and looks like this now:
