Nicely done Eric! Looks great.
I have tried a Vallejo Acrylic Model Wash made for Military Modelers. I used the dark rust and was happy with how it flowed on a flat finish. These are all pre thinned. I need to add some more colors and practice with these promising washes. Link to product below
Model Wash is perfect for reproducing the weathering of surfaces (acrylicosvallejo.com)
George Toman
Willow Springs, IL