ModelMates 49058 Dirty Yellow Weathering Dye Spray 200ml
Modelmates spray dyes contain a water soluble translucent dye, not acrylic paint. This helps give the appearance of things look old, with dirt and weathering on top of the original finished surface. Dye dries fast and is easy to use.
Spray it onto non-porous surfaces, let it dry, then smudge and wipe it with a damp cloth to create weathering effects. Wet it with water and it will dissolve similar to a water colour paint and can be brush applied.