Wallpaper Stickers on the Ceilling Must Start with Complete Cleaning of the Ceiling. Completly Remove the Old Coating from the Ceiling and Treat the Ceiling with A SPECIAL DISINFecting Solution. This Solution Will Completely Cleanse The Surface of Invisible Dirt and Fat. To sticker Wallpaper on the Ceiling, You Need a Perfectly Flat Surface, Which, If Necessary, Can Bease USING A CEMENT-SAND SOLUTION.