Ok, this is what I do for difficult wall paper removal. I use a wall paper tiger found at Walmart or other type store.I spray the wall an area at a time with a mister bottle of water.Let it set for maybe 1 or 2 minutes then use a wall paper scraper.That should remove the top layer of vinyl then repeat for the paper backing the same steps.Ifg it is paper and not vinyl it should come off first time.