When the surface becomes matte, start smoothing it out with a spatula. Before wallpapering, prime the surface and wait until it dries completely. Glass fiber wallpaper should be glued with a special glue for glass fiber wallpaper, i.e. with increased adhesive capacity. This can be ready-to-use glue or dry powder. https://gterahub.com/community/read-blog/2210_maximizing-space-smart-solutions-for-bathrooms-in-houses.html