The guy who did the taping/plastering/prime work used the followings:
After he taped, plastered and sanded the inside corners, (which were clean until) he start applying the caulking which is sued for the inside windows and doors to these inside corners. Is this correct practice? Could it help? The problem is that the caulking work was not as good as the inside corners were.
He used sheetrock INSIDE corner Bead B2 (paper & metal bead) for the OUTSIDE corners. I don't know why he didn't use the outside paper & metal corner bead or the metal only corners for the outside corners Is this correct? If not, how it will affect the prime/painting? How it could be corrected?
A B2 corner is really meant to be used on oblique angles to get them straighter. I've never seen anyone use it on an inside 90 degree angle. Not sure why anyone would caulk that joint. A B2 is really not very strong for an outside corner. I would never use it for that. It's not the correct material for that application. I'd scrape it out and put in the correct corner.