It can be used directly on the surface. The tools can be cleaned with water. Diesel Stains reproduces the orange, transparent hue of diesel, representing the traces and marks on vehicles.
Vallejo Weathering Effects 73816 Diesel Stains (40ml)
Vallejo Weathering Effects 73808 Russian Thick Mud (40ml)
Vallejo Weathering Effects 73812 Black Thick Mud (40ml)
Vallejo Weathering Effects 73825 Crushed Grass (40ml)
Vallejo Weathering Effects - Brown Engine Soot (40ml)