Stone

Lets get things started with a look at my previous stone projects.  Every one of these examples is carved from some kind of foam.  They are also all coated in Drylok.  Its great for foam because it creates a hard, waterproof exterior.

For smooth surfaces with fine details, I use blue(or pink depending where you live) insulation foam, found at any hardware store.

(awww, my very first foam carving)

For bigger, rougher projects I use white insulation foam.  It's cheaper and easier to get in large chunks (in my area).

"real rewards await those who choose wisely" -for those who don't read mara script

Drylok is also great because it ads a uniform texture.  The above bust is composed of a plastic halloween skull, foam body and a bed sheet.

The tool I use most for carving foam is a dremel tool, biggest downside is it turns the foam to dust -DUST THAT CLINGS TO EVERYTHING!  Heat wands will cut pretty clean but releases toxic fumes.  Gotta be smart about it; wear your eye and ear protection with your power tools and proper ventilation for your products with fumes.