When Games Workshop released Cities of Death, they released a set of resin Urban Barricades and Walls. They later on released this excellent set of Ork Barricades.
Orks are adapt at banging together large piles of debris, welding them with burnas and Gretchin for extra stickiness. In dense city-fights, cunning Ork Warbosses use these barricades to funnel enemy troops and prevent their armour from manoeuvring, before their Tankbustas launch a devastating ambush.
They are very well detailed.
This is how they look in the advertising materials.
One of the key things you need to do with virtually all resin models is to give them a good wash.
When the resin models are cast, the mould is given a spray (I guess) of some kind of lubricant to allow the cast model to be released from the mould easily.
However the lubricant also acts as a barrier to paint, so as happened with previous models I (and others) have painted is that the paint flecks off.
Washing the model in water with a drop of washing up liquid should remove the lubricant.
Avoid using hot water as this could warp the resin (a useful tip if you need to warped resin back to its original shape).
Once washed the model is then ready for gluing and painting, first will be a black undercoat.
There are six barricades: