Paint your figures all flat black first, this way if you miss a spot or two it will look like shadowing.  Then start with the lighter colors and end with the darker colors for the clothing and skin.  Always use flat colored paints.

Here is the deal. IF somebody wants me to make figures, they have to be SPECIFIC. If you dance around the subject and hint you want hookers,or anything [ ... ]

 This is Micro trains Line SD40-2 Santa Fe model which I customized with working ditch lights.

This is the first mainline run without any of the extras.