Yes, you can use wallpaper to hide imperfections on your walls. Wallpaper can help to disguise small cracks, bumps, and other minor imperfections. However, it is important to note that wallpaper may not be able to completely conceal larger or more significant imperfections. Additionally, it is recommended to properly prepare the surface by cleaning and filling any major holes or cracks before installing the wallpaper to ensure a smooth and even finish.