These were originally done ultra quick, ie glued up and dipped, for a friend with a small budget and a big rush. At the time he made do without properly painted up warriors, and gors without any frills.
Dipping works, but results improve much if you actually brush it on. It works especially or perhaps specifically with earth-tones, and this burnt orange or terracotta is one. So are the skin and fur. That does mean that the minis lack some contrast, so-called 'pop!' perhaps, but it sped things up at the time. The somewhat hyper-green grass helps offset the orange and brown, though.
Warriors... plastics. One converted human thrower, one converted chaos warrior with a daemonic claw hand. All these warriors had very BB-friendly poses, so it was just weapon snipping that needed doing.