Hi I didnt mix anything with them its best if you use good quality chalk pastels though. I just did them like David suggested rub them on course sandpaper to make powders. Then tap them on with a good brush used for drybrushing over the basecoat. Then blow some of the excess off and bruh with a clean brush to feather. Start with the lighter colors and move to the darker tones. Once you get it the way your liking it hit with dullcote to seal it. Then paint the hair eyes etc and if you need to punch anymore of it up go back in a hit it again just make shure you seal it or the chalks will rub off. You can also add contrasting colors like the purples and burgandys to get a brused effect around the wounds and under the eyes. As well as the small veins with blue greens and you can get a great five oclock shadow look using this method. Its known as the poor mans airbrush the effects on small kits is amazing once you get it down.