Two of the Dark Eldar skimmers, the Raider and the Ravager (it's all Rrrrrs with the Dark eldar).
I painted them in Tamiya metallic blue outlined with Cote d'armes metallic purple to give what I fondly believe to be a flickerfield shimmer effect. It also makes them look a bit eerie. The only other colours used are shades of red for the plumes and copper for gun barrels, eye visors etc.