I notice on almost all the pictures here the models are weathered and look used, I've never tried this and have no clue how to do it. I'm particularly interested in how to go about making powder burns near guns, like on the guns of a P-51 theres always black streaks behind each gun. Also, my understanding is to "chip" paint you use a toothpick while it is partially dry? Is this true?
And one more question...Whats a wash???

Mitch