I have finished sticking my Ork Stormboyz together.
The models which come as a multi-part plastic and metal kit have also had components from the Orc Warriors Warhammer sprue used.
They have now being undercoated black. Their jump packs have been undercoated white and I am painting them separately (hence they are glued to a strip of thick plasticard as shown here before being undercoated).
I am intending to paint the jump packs in reds and yellows.
The jump packs in my mind would make excellent large rockets for Epic Armageddon, however at £2 each they are quite expensive, if you wanted a large number it would be cheaper to buy the Stormboyz boxed set!