I got the Ruined Factorum sprue from the Warhammer Imperium part work, issue #31. I constructed the model, undercoated it, and after giving the model a basecoat of Mechanicus Standard Grey Spray I gave the model a wash of Nuln Oil Shade.
Once the model was dry I drybrushed the model. I first used some Dawnstone Dry Paint and then a lighter drybrush of Terminatus Stone.
These photographs don’t really show the finished model, so I think I will need to retake them. This one taken with a phone does show off the drybrushing much better.