From the announcement:
To celebrate the release of new Survivor Paint Set we have made an all-you-need bundle for all Zombicide Painters over on The Army Painter webstore.
Buy all 3 Zombicide Paint Sets and get a free Colour Primer: Skeleton Bone spray. All you need to paint the popular Zombicde boardgames series - both season 1, 2 and the forthcoming season 3.
Includes the Zombicide Core Paint Set + the two expansions: Toxic/Prison Set and the NEW Survivor Paint Set.
FREE Colour Primer!