I'm definitely going to file away that salt technique for later. Unfortunately, I don't have an airbrush and also don't want to use rattle cans. My plan, since this is a fairly small area, was to use a pin needle and/or sharpened toothpick to dab the chips on. It will probably take some time, but again it seems confined to about 1/2"-3/4" square area, and I will practice to see if I can achieve the effect first. Thanks for all the input guys.