Use the rotary tool, chisel, or a small router to remove all soft, punky wood. Go 1/4” to 1/2” into sound wood. Undercut the edges slightly (create a dovetail shape) so the filler locks in mechanically.
Use the rotary tool, chisel, or a small router to remove all soft, punky wood. Go 1/4” to 1/2” into sound wood. Undercut the edges slightly (create a dovetail shape) so the filler locks in mechanically.