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://www.janubaba.com/c/forum/topic/246398/Serious_Corner/Is_it_worth_changing_the_toilet_Seat_yourself