Hey, Greg....
Rich has this technique down cold and is a real artist! As Rich points out, by buying some pastel sticks at an art supply house, you can begin to get to where you want to go. The black pastel dries as a grey, the browns, reds, and tans all work well, too. They can be turned into a fine powder by grinding the stick onto medium grit sandpaper. From there you can begin using a damp brush for application. You can also do what I call a 'rub 'n wash' by distributing the colored effect across the surface with a damp Q-tip for a swapping tool. I also find that chalks and pastels 'seat' themselves well into flat finishes because of the porosity. I have yet to clearcoat a model that I've weathered in this way. I have since changed over to the Bragdon powders (
www.bragdonent.com) which are formulated to adhere to surfaces. They're applied in a similar fashion. You may want to get a small, short bristle brush at the art supply shop while you're there...it does a great job of working dry owder into the finish for wet swabbing afterwords. Here's a DL&W express box that I did usiong this method. After seeing Rich's work, I have some more practice to do!!
Russ
Russ