I have a building that has bricks that are flaking off (very old), and we do not want to have to re brick these sections. Is there a product that can be used to spray or roll over the bad areas to lock the face of the brick in place

Help! I am removing old wallpaper in my new house and the paint behind it is peeling with it. Only some sections of paint are peeling, and using moisture to remove the wallpaper paste is making it worse. Any suggestions?