I have a wall in my dining room that has had a pine wood bookcase hanging on it for 13 years. Today, I unscrewed it from the wall so that I can paint the wall. But every time the paint dries, a ‘shadow’ remains on the wall exactly where parts of the wooden bookcase were touching it. I’m guessing that something has seeped out of the wood and into the wall.
Photo of the wall. Sorry, the light is poor in this corner. But you can hopefully see the darker, horizontal strips where the bookcase shelves used to be - despite 3 coats of paint. The new paint is the same make and colour as the original. It is emulsion, chalky and has a very matt finish (it is made by Farrow & Ball, New White No.59).
There is no indentation in the wall from where the shelves were. But the paint finish looks and feels different in the places where the shelves were.
It is a brick wall, between my house and my neighbour’s.
The ‘shadow’ was visible on the wall when I took the bookcase down, and is sadly still there.
Can anyone suggest what might be going on here and how I can get rid of the shadow?
Many thanks for any help you can give me.