I used gouache exclusively for this and I must say, even though it takes some getting used to, I really like this stuff. I think I'm going to start using it exclusively for lifedrawing from now on. I wish I could take it with me everywhere I go, but it's ok. Right now I'm trying to get experience working with color, the more I familiarize myself with it, the better. She's not as an elusive mistress as I once thought, thankfully.