A part of my Iron Warrior army.
The leader is the plastic Chaos Lord model with metal Techmarine servo arms and a converted base. The horns were chopped from his helmet as the Iron Warriors tend to remove all traces of corruption.
The Dreadnought is heavily converted with new leg armour from a tank trap, feet from a Space Crusade Dreadnought, custom base and smoke coming from its power plant.
The Baneblade is fully converted to Chaos with wire mesh, covered Imperial Eagles and a few icons. The spotlight is a working led lamp with battery inside the body of the tank.
Obliterator has greenstuffed stretch marks, they are the only corrupted marines the Iron Warriors will tolerate amongst them as they have incredible firepower.