Since Firefly build is coming close to an end, I decided to start working on the base for it. I sculpted base it using DAS (air drying sculpting clay). After shaping general terrain layout, I added tracks impression on the ground, with DS tracks from another Firefly... It still needs some more detail, but here's general idea of it.
I started weathering stage using Winton's artistic oil paints. Firefly received oil wash, rainmarks and some highlights.