I am renovating my son’s bedroom and trying to make the walls as nice as is reasonable before repainting. There are a few cracks like this in the paint. It looks like on top of the drywall there is paint, wallpaper, and then a few more layers of paint. The cracks could be at the seams of the drywall from expansion and contraction. They could be at the seams of the wallpaper. They could be something else. Most of the cracks come straightish down below the sides of windows, which makes me think drywall seams.
I gouged out one crack and filled it with joint compound to see how that works. Since the drywall is old, it was really hard to tell if this is at a drywall seam or not - there are places where previous work, maybe mouse damage, and who knows what else has made the drywall crumble from behind. These are the joys of an older house!
How would you handle this?
I think there’s a “right” way to do this and a “temporary” way to do this.
Temporary: Paint with a brush and jam paint into the cracks to fill them. Paint again if necessary.
Right: Remove wallpaper. Paint. This will be MUCH more work and could lead to replacing the drywall which could uncover mold or other problems in the walls and turn “just painting” into a MAJOR PROJECT.
The choice is yours.
The worst part is the temporary fix will last basically forever if nobody wants to repaint and they use enough goopy latex paint