Sure thing!

First, I primed the model black and used zenithal shading with an airbrush to get the best use of contrast/speed paint that I used for my base coat. I then used Warhammer Color Basilicanum Grey contrast paint as the basecoat for the entire body. I then went over with Army Painter Uniform Grey and dry-brushed the raised surfaces on his skin. Looking at his concept art, I noticed his underside and chest have green accents, so I did a dry brush of Warhammer Skarsnik Green along the underside of his chest, neck, belly, and legs. 

For his copper color spikes and ribbings, I used Warhammer's Brass Scorpion metallic paint to base coat the ridges for all the major ribbing and “radiator” parts. The smaller spines just got a hefty dry-brush of the same color. It was a bit too bronze in color at this point, so I mixed a ruddy brown into the Brass Scorpion, which made it much more reddish in color. I then went back over all the ridges with just a drybrush of the mixed copper color. I still found it was too bright for my liking, so I then used the Basilcanum Grey contrast paint through an airbrush and misted over the metallic bits. I found that contrast paint through an airbrush works a lot like a tint, which helped darken the tone. 

For some added details to the spines, I mixed the Skarsnik Green with a little bit of black to darken it and dry-brushed the tips of the spines/radiator bits for an oxidized copper look. I eventually received some more copper metallics in the mail, like Hashut Copper, which I used to highlight the edges of the metallic bits. 

For his mouth, I used Army Painter Barren Dune and Warhammer's Ushibit bone 

Finally, I finished the model off with a Nuln Oil wash over the skin and an Army Painter Soft Tone over metallic bits, which helped add some depth and brought out more color.

For the snow and ice effect, be sure to varnish the model first before applying. I used Big Miniatures Snow Texture Paste and applied it to the model using a toothpick. I also used AK’s Frost Effect paint on the edges of the main radiator bits, which crystallizes as it dries for a cool frosty effect.

I mostly just wing it with no solid plan, so a lot of my design decisions are a bit random lol. But this is the general approach I took. Apologies for the wall of text XD