Driving the Post Apocalyptic Highway

I'm starting a project to finish all the unfinished lead on my painting desk. On top were some Hot Wheels cars I had set aside for some Post Apoc racing. Behold the results.
I started by gluing them to some bases I layered out and gluing bits of scrap for armor and rams. Then I sprayed them matte black.

Then was dry brushing everything a rust color.

 Then even more dry brushing with the color the the car was before rust and road damage took its toll.

It was a lot a fun for not too much money or effort. About a dozen more to come.