Finishing drywall can be a tricky art to master. If you’ve never finished drywall, the best place to practice is inside a closet. An outside corner is almost as good; if the corner bead is installed properly, its nose functions like a concrete form over which you screed the joint compound.
Corner bead is available in several materials, including vinyl, paper-faced, and metal, but the simplest to work with is the “tape-on” variety such as Beadex (www.usg.com; 800-874-4968). This paper-faced metal bead installs without nails. You bed the paper in all-purpose joint compound. Many professionals say tape-on corner beads are less prone to stress cracks than traditional nail-on corner bead.
Adjoining corners and seams should be taped and allowed to dry before corner bead is applied.