How to repair damaged lining paper

You can strip of the whole sheet and replace it however you need the batch number of old wallpaper in order to match the pattern or flowers I hope my answer will help you thanks

best thing to do would be to strip off the old lining paper and re hang new

Materials you will need: Wallpaper adhesive Wallpaper brush or roller Utility knife or scissors Sandpaper (fine-grit) Spackling compound or filler (if needed) Paint or wallpaper to finish 1) Assess the Damage: Determine the extent of the damage. If the damage is small, you might be able to repair it without replacing the entire section of lining paper 2) Prepare the Surface: If the damaged area is loose or peeling, gently remove any loose or hanging pieces. Be careful not to damage the surrounding paper. Sand the edges of the damaged area with fine-grit sandpaper to create a smooth transition between the damaged and undamaged portions of the lining paper. If there are any holes or gaps, fill them with spackling compound or filler. Allow it to dry and then sand it until it's smooth. Replace the Damaged Section (if necessary): If the damage is extensive or the lining paper cannot be repaired, cut out the damaged section using a utility knife or scissors. Cut along the edges of the damaged area to create a clean and straight edge. Measure the size of the removed section and cut a matching piece of replacement lining paper. Apply Adhesive Carefully position the replacement piece over the damaged area, aligning the patterns if necessary. If you've replaced a section, make sure the edges of the replacement piece blend seamlessly with the existing lining paper. Allow the repaired area to dry according to the adhesive manufacturer's instructions. This usually takes a few hours. Once the repaired area is dry, lightly sand it to ensure it's smooth and level with the rest of the wall. If you're painting the walls, make sure the repaired area matches the surrounding paint color and texture.

If you don't have any extra lining paper, on a small area of damage just apply joint compound or filler directly onto the exposed plaster. Smooth it down with a decorators knife to achieve a seamless surface. After the compound dries, sand it down, then proceed with priming and painting as suggested earlier.