
Unfortunately, whoever did the work apparently used what I believe to be toothpaste to fill pin holes. A year ago the "work" looked like melted icing dripping down the wall. Finding this quite disturbing, I wiped at the mush; it smelled rather minty fresh. After cleaning the obvious blemishes, I went on with life.
A year later one can now see several other "fixed" areas where the "patch" has turned yellow on the bright white walls.
That's definitely not wall putty.