I've had these guys for a long time, they came with the first batch of Warmachine minis I got. Put them off for so long because I'm not a huge fan of the material. The quality and detail were pretty good. However, the material is a very hard plastic, harder even than Mantic Games' minis, which is saying something. It was not easy to work with at all.
Assembly:
Kind of a paint. The head parts were a little awkward. Thanksfully these didn't have too many pieces, like other Privateer Press minis, but I still feel like they require more time than is necessary on to assemble and clean them. Mould lines were not easy to remove.
Paint:
Primed with Badger Stynlrez primer, brushed on. Miniature painted purley in oils. Mostly Winsor & Newton Winton line, with Gamblin silver as a "metal medium" for all the metal parts. Took a couple hours to paint the oils, then left for a few days to dry. Wanted to try for both a green and blue engine core, with the appropriate reflections on the metal. Sealed with some matt varnish from Reaper Miniatures.
Base:
Kept it simple with just some sculpy with a Green Stuff World texture roller.