Steaming (as in wallpaper striper) may work (soften and scrape from underneath) but if you're leaving the underlying substrate in pisspoor state then maybe pull the whole lot down in one for re-bording. Any prolonged overhead work soon becomes frustrating and arduous. Sorry I've no real lived experience. It's pattern condition and area size could have bearing I've a distance memory of chemical application that is covered to soften then scraped away
Steaming (as in wallpaper striper) may work (soften and scrape from underneath) but if you're leaving the underlying substrate in pisspoor state then maybe pull the whole lot down in one for re-bording. Any prolonged overhead work soon becomes frustrating and arduous. Sorry I've no real lived experience. It's pattern condition and area size could have bearing I've a distance memory of chemical application that is covered to soften then scraped away