I just recieved the zone Mortalis set from FW. It's different in terms of materials from anything else FW or GW have done. The plastic/resin is black and not at all brittle like regular FW resin (or Finecast). I'd say it has a hard yet almost rubbery feel to it which would seem to be more durable and better able to cope with the rigours of play.
Here's a link to a photo of one of the pieces
[url]http://www.flickr.com/photos/12672095@N04/6817089820/in/photostream[/url]
Here's the underside
[url]http://www.flickr.com/photos/12672095@N04/6963210313/in/photostream[/url]
They mention that there can be bubbles and imperfections - there are some - here's the worst I saw (upper right corner):
[url]http://www.flickr.com/photos/12672095@N04/6817089670/in/photostream[/url]
Most of the imperfections I saw were minor and blended in with the rugged appearance of the kits.
Anyway, thought it would be interesting to share!
Cheers!