For todays installment, I'll show how to paint the classic "chaos screaming faces" on a banner. You can use this tutorial on any surface, really.
Start by painting and highlighting the banner as you would normally, without any extra designs. You can never tell what bits may end up peeking through. In this stage, I included carefully painting on the main skull. Once you finish with your basic banner (my basecoat was Scab Red), paint clusters of blobs (2 small ones above a larger one) with a darker color (I mixed a bit of black with my Scab Red) to give the basic shapes of the faces.
Next, fill in the gaps between the faces with Red Gore, leaving a slight line of Scab Red near the dark.
Now, with Blood Red, start picking out the lines of the faces. Take a look at pictures of faces to see where the ridges generally are, and try to mimic them. Also, paint small blobs in the middle of the eyes, and running horizontally across the tops and bottoms of the mouths. These are the base of the pupils, and of the teeth.
For the first highlight, highlight the ridges you just painted with Blazing Orange, and paint a line in each pupil, and a series of vertical lines in each blob in the mouth. These are the basis of the teeth.
Finally, with Golden yellow, paint light highlights on the ridges, put a dot in the middle of the lines in the pupils, and highlight the teeth.
As one last (optional) step, apply a glaze of Future Wash (1 part Future Floor Polish, 4 parts water, and a few drops of Blood Red paint) over the face areas. This gets rid of that nasty chalky look. Make sure not to get any on any alternatly colored areas (ie, the skull)