TERRIBLE PLAN
Can I use flour dough as wall plaster?
No, using flour dough as wall plaster is a recipe for ruin, not renovation.
Flour dough is about as useful for wall plaster as a chocolate teapot. It lacks the durability, water resistance, and strength needed to hold up on walls. Use proper plaster or drywall compounds unless you want your walls to look like sad, soggy pancakes.