Grey Stuff (Sculpting Putty/Epoxy)You've used Brown Stuff You've used Green Stuff Say hello to the next generation in modeling excellence; with both superior form and function GREY STUFF! Gale Force Nine is pleased to introduce you to Grey Stuff. The newest addition to their hobby supplies range takes sculpting putty to the next level in terms of performance. Simlpy put Grey Stuff is the new standard by which all other brands will be weighed, measured and table tested! Easier to See