Can there be some glue residue left on the wall when you prime it? Will the new texture and paint hide the imperfections?

After removing wallpaper should one sand the area where wallpaper was to prepare it for painting? What are the steps involved before painting?

About 20 years ago, we had a professional wallpaper hanger hang a commercial grade vinyl using commercial paste. As the vinyl is very thick, he obviously had to use a lot, and the vinyl was somewhat textured, not smooth. We removed the vinyl in our entryway. The paste, of course,

We currently live with my father in-law and everything is wallpaper. We took wallpaper down in our son’s room however they used no primer on the drywall prior to putting up the wallpaper plus they used wallpaper glue. Long story short the walls where ruined from trying to take the