Beautiful looking board and minis. I'm painting my set bit by bit but nowhere near this standard.
How did you weather the die-cast type cars in there? I've tried washes before but they don't seem to adhere right. Is it just a case of Matt varnishing first?
Can't speak for the poster's approach, but my toy car weathering approach is:
- take the thing apart if possible
- matt varnish the outside. This will frost the windows if they're still in the car, and is the main reason I dismantle it first. The other big reason is that it lets me get at the wheels and wheel wells more easily
- use washes to tone things back and force some shadows, then cheap craft paints and sponge to weather the crap out of everything

- put the car back together. I also glue the wheels in place, but that's as much to stop them rolling about in storage as anything
The game looks fun though. I avoided the KS, now just need to talk myself out of buying it at retail

I'm hoping that the figures will be released separately, as there are some I'd definitely like to get.