I have plaster walls in a home that is about 50 years old. I have tried patching the plaster with both plaster of paris and drywall mud. Hairline cracks appear almost immediately.
I have probably about a dozen cracks in various places, such as the ceiling and under the windows. The cracks in the ceiling run the entire length in the living room and the master bedroom.
I know from experience not to fight the building, so I want to put in an expansion joint. But I don't like the conventional expansion beads ones because I don't like the idea of having a 1/4" gap, especially along the ceiling.
Is there a product I can use where I can cap both sides of the crack so they will be flush with each other but not as ugly looking as an expansion bead? I was thinking about using something like this, and making them flush with each other. This isn't what I am going to use, but it gives you an ideal of what I am planning.

What does everybody think?
I was thinking of pulling out the caulk, using a router to straighten up the cracks putting some kind of a l-shape straight edge on both sides of the crack, screwing them in, use joint compound and paint.
– Enzyte Bob Oct 08 '14 at 04:10I can live with the walls, but the ceilings are what bother me most.
– Enzyte Bob Oct 08 '14 at 04:17