I stopped by a local arts and crafts store and these things caught my eye.
They're supposed to be little forms for building snazzy looking sand castles. But they totally looks like Necron tech. Imagine the domes painted as green energy balls with silver around and blue armor plating around the bottom.
If I can work out a way to prime (it's still fething cold here!), these should be a really quick paint job and a way to add some little barricades or objective markers to my army.