Wallpaper stripping

[dustnbones2]

My partner is stripping off living room wallpaper with a steamer.
The problem is not getting it stripped to the bare wall. Any recommendations on how to do this effeciently? And does the wall be plastering once the paper is removed?

 

[foxhole]

You need this .

Prep Heavy Duty Scraper

With a 100mm razor sharp blade, this Prep heavy duty scraper will cut through tough materials with ease. Use it to remove tiles or vinyl flooring when re-doing a bathroom or kitchen. It will also come in handy when stripping wallpaper or removing paint.The robust stainless steel shaft has a...

www.toolstation.com

Also there is a larger two handed version .
Adhesive has to be scraped while still warm from steam , work top to bottom so water from steam is presoaking wall below .

 

[DAZB]

You can also use a spiked roller or a Paper Tiger such as this....

Paper Tiger Triple Head Wallpaper Scoring Tool

Patented scoring wheels that perforate wallpaper allowing Zinsser DIF wallpaper stripper to penetrate. Perfect for large wallpaper removal projects. Triple heads work rapidly cutting through several layers of wallpaper without damaging walls.Scores an entire room in minutes. Eliminates the need...

www.toolstation.com

The steam or even just water will then penetrate and make the job much easier.
As for plastering, you will not know until you have uncovered it all so fingers crossed it will no be too bad for you.