Follow these 8 videos by Duncan Rhodes (Games Workshop) on Paining your Dark Vengeance set.
Video 1 : Assembly
Video 2 : Tactical Marines
Video 3 : Deathwing Terminators
Video 4 : Ravenwing
Video 5 : Dark Angels Heroes
Video 6 : Chaos Space Marines
Video 7 : Chaos Cultists
Video 8 : Hellbrute