Thin and cracked

Well, look at that. 

Our ceilings were wallpapered.  

Correction: are wallpapered. But covered with a thin coat of plaster that doesn't like to be messed with.

Begin mantra: 
I will resist the temptation to redo the entire ceiling.  

I will resist the temptation to redo the entire ceiling.  

I will resist the temptation to redo the entire ceiling.  

I will resist the temptation to redo the entire ceiling.