In the picture below, there used to be a tall cabinet that left marks on both the ceiling and the wall. I want to restore the wall/ceiling to match the rest of the room, but what puzzles me is this yellow area, and I'm wondering what it actually is.
Behind the 'surface' there is only plaster on both the wall and the ceiling, and the yellow smooth surface is so thin that I guess it's old white paint that has just yellowed? Did people do that in the past to bind the plaster? It's very porous.
I considered plastering this, but it won't turn out well if there's no plaster elsewhere?
I have moved the kitchen to the room next door, planning to make this the bedroom.
It seems like back then (1938?) they were content with just painting directly on the plaster? It's some form of harder surface, so maybe it was treated with something else before it was painted. I'm mostly interested/curious, hence all the questions
yes, it definitely gets weird to just paint maybe.
Spackla is probably the only solution, but won't there be an ugly edge between the old 'white' ceiling and the new 'spackel-surface'? Do you have any special binding agent you usually use?