Using greenstuff

I am about to convert a female fantasy figure into a dark age warrior. I have clipped off the fantasy weapon, modified a hand to hold a sword, and the other hand to hold a shield. Now I have to reduce the exposed cleavage and so will be using some "greenstuff" to cloth her. Since I have never done this before I looked on for tutorials. While there are many, I thought this one on making a cape was especially helpful