Mike, Shain and Keith,
Thank you for the compliments.
First, those are the vinyl kit tracks. I airbrushed them with acrylic paint at low pressure and farther away than usual for the paint to slightly dry gritty. Then they have a wash of Future and water soluble oil paint, then spattered them with various earth color acrylics, finally drybrushed steel.
Second, the scratches are just a #2 artist pencil. Just tap-tap-scratch-tick-tapped around various directions and pressures until I was happy.
The kit is defuct (?) MB Models from North Carolina. It is a resin turret and upper hull with metal hatches and gun. The builder must supply and fashion the infantry rails on the turret. Attaches to Tamiya's KV-1 kit. The KV-85 was an up-gunned KV-1, roughly a prototype for the Josef Stalin series. Another Armorama posted a link on my original posting that it was a KV-1 hull modified for the JS-1 turret, IIRC. The kit is innaccurate as she didn't retain the bow MG.
The rust puddles are my thoughts on weathering. I figure rust or dirt, from looking at construction and farm machinery, all but fresh rust gets dark, and dirt and gunk pools where water carries it, drying in whatever color nature mixes it, but mainly a rusty, gummy, dirty brown of various hues. So there are 3-4 washes of various rust-browns, some local, some intense. The Future does a great job of drying with the pigments pulled straight down instead of pullinbg it off to the edges, a'la mineral spirits, alcohol, etc.