The air was thick and oppressive. The acrid taste of iron permeated her helmet’s respirator, heavy with a millennium of entropy. What could have befallen this place, wondered Shas’la Shu’to? A whole Gue’la sector deserted and left to rust like some long-sunken vessel. To the T’au, mankind’s primitive architecture always seemed blunt and overbearing, but this was worse. It minded her of the desiccated cadaver of a hulking and impossibly vast leviathan; a rib-like maze of collapsing gantries and stanchions.

Here’s how to get a genuine rust effect for your Warhammer 40,000 and Necromunda terrain.