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My wife and I have bought an old 60s brick house. The internal walls are cement with as far as I can tell a painted plaster coating.
There are a number of places where the plaster is loose or cracked and needs to be repaired. In the first image you can see an area where we have chipped back a loose section to expose the concrete.
What approach could I take to repair this wall? If I sand back & prep the remaining undamaged plaster would it be feasible to patch areas like this with new plaster?
As a secondary question, the concrete walls have expansion joints that were filled with a lighter grout/cement that has cracked in parts. Refer to the second picture.
The light is because the joint goes all the way through to the next room.
How/what type of product would you recommend to fill the expansion joints before refinishing the wall?
