Glue Process
To glue the joint, coat the inside walls of the mortise, the bottom of the Mortise, as well as the back side of the mitered part (as shown in the picture). The idea is to not have too much glue that you have excessive hydraulic pressure in the joint. Also you don’t want any squeeze out on the face of the joint, if you do, it will change the way the material looks when applying the finishing.
Apply the glue in this manor: