I experimented with sanding down styrofoam to create a head like structure. This was a very long and messy couple of hours but it was worth it did have fun with it. I started with four separate pieced in which i glued together and began sanding.
I only had a big block of sanding sponge so it was hard to get details in. In the end i made it to look like it was almost made out of stone.
Because i used separate pieces i could also play with the structure of them and so i tries different variations of how i wanted it to look.. I may possibly cast this or paint over it.