It's a good idea to put some alcohol on a cotton ball and go over the face to remove all traces of oil before beginning.
Fill the clean white sock with baby powder and tie a knot in the end. You'll be using this powder sock to set the makeup. Setting greasepaint make-up with powder will make it last and last. To remove the make-up when the evening is finished, use anything grease or oil based to instantly dissolve it -- cold cream, baby oil, etc.
Apply a thin coat of spirit gum adhesive to the edge of the nose and the areas of skin where it will be applied. Allow the spirit gum to set for a minute or so then press the nose down, sealing the edges. Hold nose in place until adhesive dries and it is firmly in place -- about 3 minutes.
After the nose was applied, Richard took some green greasepaint on a make-up sponge and apottily applied it to Tracy's face. Notice he didn't cover her entire face in green, the effect we were going for here was almost of moss or mold growing in patches and shadows.
After applying and blending the green, Richard used dark brown to bring out the features like wrinkles ad eyebrows. Even though Tracy's natural face is not wrinkled, Richard followed her natural laugh lines and facial structure when applying these wrinkles so they would move with her face and show expression.
Richard then lined under Tracy's eyes in red for a scary effect (check to be sure that your red make-up is safe to use in the eye area, not all of them are). For the mouth, Richard used black greasepaint as lipstick. At this point it's time to go outside (otherwise it makes a mess) and powder. Have your subject lightly close their eyes and hold their breath while you lightly tap the entire surface of the face with the filled powder sock. Take a shaving brush or baby's hairbrush and brush away the excess powder and your ready for your costume!