Posted - 17 April 1999 12:16
The old corner bead occupies space thar needs to be cut
slightly short of the old beaded corner. Therefore the
old bead must be removed. Use a stanly knife to cut
to the paper about 1/2" outboard of the metal. Use the
same cutter to remove lumps that interfere with a close
fit of the new corner.
A neater job can be done with a hand held router
with a vacuum dust collecter, 1/2" to 3/4" wide flat
depth cutter, and edge fence. I suggest you take
several slight passes to approach, but not penetrate
the sheetrock paper surface next to the metal. The
second and following corners you replace will be much
easier. If you are not familiar with the finishing
process,get someone with experience to do this.