The round bits on his forearm plate are microbeads I picked up from Michaels ages ago. I'll paint them up as rusted metal bolt heads. They work great as rivets on Space Marine models, but look rather large on this guy. Ah well, I'll keep an eye out for some smaller scale rivet and bolt heads.
I am really liking the big shoulder spikes. They filed easily, and they fit nicely into pre-drilled holes going down into the figure for stability. I don't want to lose them mid game.
Thanks for reading!