Have stripped the wallpaper from my two bathrooms. Underneath the wallpaper was the green board used in bathrooms for moisture. However, when I was stripping the paper I accidentally ripped some of the green board paper. What is the best way to repair this? I guess I would fill in all the surface holes with spackling and then sand lightly with a 300 grit paper. (Just build it up.)
Am I correct or could you suggest a better method for prepping the surface for a paint finish.