A small bit I did for a modular grenade I had posted before. Essentially a booby trap that's got saliva activated glue at the bottom which expands if you spit on it.
It's all fully done in 3D Coat including render in Renderman.
I've talked about all steps of creation on my youtube channel. No need to subscribe (surprise!)
I used my 3d scans from here -
Also, you can get free decals that I used here -

Lasermine - Part 1 - Voxel Concept

Lasermine - Part 2 - High Poly Texturing

Lasermine - Part 3 - Foam Sculpting

Lasermine - Part 4 - Renderman Rendering in 3D Coat