The final post! A week of necromunda terrain photos has come to an end. I'm sure you'll be seeing more of these once we get some games started back up again. So the final step after the weathering powders was a very light to light spray of black paint to give a soot effect. I held the can pretty far from the pieces so it wouldn't just paint all over everything but give a nice dotted effect. Between the weathering powder and this spray, it really helped to pull all the disparate parts of these terrain pieces together.
I also gave the undersides a much heavier spray. Yes you mostly can't see the bottoms of steps and such, but in necromunda you are often leaning over to get a model's eye view and I couldn't put up with the thought that the bottoms of the steps would look perfectly clean. This was a quick way to resolve that and it added a bit of extra depth to the soot being sprayed from a couple angles. Then all it needed was sealing, and a quick touch up of water effects over the blood and they were done.