I am struggling to get surface textures to stick to near-vertical surfaces. I am trying to apply fine gravel, ground foam, etc. to painted plaster hillsides. A lot of my ground cover material doesn't stick but instead ends up in a pile at the bottom. For glue, I started out using thinned white glue but after much failure, I am now using full-strength white glue. Before applying the material, I mist with wet water and afterward, I mist again with thinned white glue. This procedure works fine for flat or near-flat surfaces. But as the angle of the surface increases, I am not having enough success making the ground cover adhere. Any recommendations?
Don Merz