These started out as cheap white plastic body parts. I used black plastic garbage bags and a heat gun to create the wrinkled skin. Then, either dark woodstain or flat camo spray paint to cover the shine. Several colors of spray paint and then finishing touches of craft paint for the colors. Then a covering of matte sealant to finish it off. I'm not sure if they should have been lighter in color to show up better in the dark.
Fake Ice - Make a square foil mold using a small block of wood. Fill with plastic jewelry beads and cook in the oven for about 20 minutes at 375 degrees. Monitor as the cubes bake. If the melting beads get lower than you want, throw some more in. Once melted pull from the oven and let cool. Depending on how well you made your mold, you might have to file some edges down. And there you have it, fake ice...