This is my first ever attempt at weathering a model. The truck and trailer are painted faded Olive Drab to show a well-used vehicle. The Airfix M4 Sherman was painted a darker shad to indicate a vehicle fresh from overhaul. The mud, dried mud, dirt , and dust was Walmart acrylic craft paint thinned with alcohol and applied in varying thickness with several brushes. The M19 is bed-loaded with supplies for the unit receiving the refurbished tank. I had a lot of fun with this project.