The model itself is visually striking. At a glance, the colours and design make it seem rustic and realistic. Get closer, and you can see the character of the model. From the wear of the joints to the erosion of the paintwork, it has so much character. I find the highlights you've done to all the nuts and bolts to be the kicker for me. The face itself just shows so much of the character's personality with his gruff expression and worn metal.
The base is also exceptional, it is well painted and is very striking. It actually reminds me of a clump of ground just ripped from from under his feet.
There is so much detail and character in this model. Exceptional work!
bottom layer is blocked with self hardening clay. i've added some pipe straws and cables in it, then covered it with modelling paste to give it the right shape and detail. also sprinkled some grinded stones on it.
above it is a styrofoam piece, roughly squarish, to represent concrete layer. above that, a few pieces of plexiglass, broken with a hammer :-p this is the asphalt. i've applied a thin layer of modelling paste over it to give it some texture.
when everything is dry and nice, i've painted it.
burnt umber and earth brown and some greens and reds for bottom, stone gray for concrete, tarmac for asphalt, highlights with silver drybrush.
everything took roughly one day, including drying times.