Hi, I'm new to filter washes, so I'm hoping for a little advice. I'm painting a Cold War style Russian vehicle, in overall green, so what sort of a filter would work best on a vehicle that's relatively new and in fairly good clean condition, and where should that colour be applied?
I know it's fun to weather vehicles, but I am painting models for sales display, and don't want to obscure the product details with mud or other material.

Thanks in advance!
Jon