Matt, you're the first one to catch me out on that. I usually do my weathering with pastels after a coat of Dull Coat. With my NMF models I haven't done the weathering because the finish is too slick to hold the pastels and I haven't had the guts to experiment with a new method on something that looks good as is. As a result all my planes in NMF look "clean" One of these days I'll get up enough courage to experiment with one.