To increase the level of accumulated dirt around the bodyside doors, some more pigment (MIG Productions Black Smoke) has been added with the filbert brush. By using small quantities again, the effect has been kept to a minimum. A little has been dragged downwards from the cab window and from the sloping top of the fuel tank. The cab roof has been treated and so has the area around the bottom of the oil filters. In all cases it has been just enough to disturb the even surface produced by using the airbrush.