I picked up a copy of Warhammer Imperium Issue 37 which comes with some Thermic Plasma Conduits.
This kit is no longer available from Games Workshop and I did quite like the idea of these and using them with the ruined factorum models that I also got from earlier issues of Warhammer Imperium.
You get one large sprue which splits into two smaller sprues, and allows you to build a series of conduits.
The kit goes together quite easily. I made mine into three large conduits.
The models were then given a white undercoat.
I gave the models a basecoat of Leadbelcher.