Some news out of True Earth has some news shades of dust filters for your weathering purposes.

True Earth has announced two new shades of dust filters. The new shades are Dusty Mud and Dusty Track. These new liquid water based filters add to the existing filters to provide more range in weathering vehicles. They can be applied with an airbrush or brush. The new filters are available individually or in a new set, Liquid Dust and Mud which will include a bottle of Fix & Wet.