Next, it's time to create the lip molding frame to trim the edges of the cut-down cabinet doors. Measuring is critical in this step. Because of the contour of the lip molding, mark the door where the miter needs to go, then transfer that mark to the corresponding spot on the lip molding. With the lip molding marked, cut to a 45-degree angle on the miter saw.
With the four sides of the frame mitered, attach the lip molding to the cabinet door first with a thin layer of glue, then secure it with a nail gun (Image 1).
Use wood putty to fill in the gaps at the mitered corners and to fill in any nail holes. After the putty has dried, sand, prime and paint the cabinet doors (Image 2).