For inner corners, fiberglass mesh tape is often recommended for plaster work. I'm not sure what to do for outside corners.
Thanks. Does "setting type joint compound" mean hot drywall mud of different drying time (e.g. 5, 20, 90 etc) they sell in bags? I was thinking about that but was skeptical how it integrates with plaster (i mix 2.5 masonry sand to 1 hydrolic lime for inner coats and 1.5 fine silica san to 1 hydroli lime for the final, smooth coat).using a setting type joint compound (mix it up until it has a medium consistency) and using a 10" drywall knife.