I have an approximately 113 year old house with wall paper that is I'm guessing around 30 years old, maybe a bit less. Plaster walls behind it that are white, I'm guessing some type of primer had been added prior to the wall paper as it was on top of a bunch of patches to the wall.
My question is once I get the wallpaper off, how can I go about evening out these patches. Just based on the one strip I have removed thus far there are going to be tons of patches all over the place and they are definitely proud of the surface of the wall. Can I sand them down like drywall patches, or do I have to skim coat the entire wall?
If I put enough primer on there will it help the paint not to seep into the patches and thus be blatantly obvious?
I have a picture showing all of this, but the site keeps telling me it's an invalid format, even though I tried .jpg and .png, and resized it down.
Any help you can provide would be greatly appreciated!