Lincrusta

Because lincrusta is cemented in place () not glued it tends to put half the wall down with him.

The best way is to roll with spikewalls aspike put a little soap powder in the water, which makes it heavier and soaker in a better boat is good, but lincrusta original was made from cement can be messy

rent or buy a boat wallpaper and scrape

I drill, glue and then paint over it without solvent with a brush or roller, let it soak in well, then try a steamer or heat gun and putty knife confidence. This will be a messy dirty job. Good luck.