While the pegs are drying you can begin to prepare the frame. We ripped our pine to create a 2" (5cm) frame. We used the remaining strip created from this rip to glue to the underside of the main frame piece - this will hide the edge of the plywood. Before gluing these pieces together you will need to create a rabbet in the edge of one of the vertical pieces to accept the acrylic door. We measured the distance between the top row of pegs and bottom row and added a total of approx. 1" (25mm) for the height of the door. You can add another 1/2" (12mm) for the length of the rabbet to allow for any door sagging or misalignment.

We made a 3/8" x 3/8" (1 x 1cm) rabbet with a rabbeting bit on the router table. You can clean up the ends of the rabbet with a chisel.

Once the rabbet is complete, you can glue up the pieces that will make up the frame. You can use yellow glue, lots of clamps and some brads to ensure that the joint is strong. When the glue is dry you can, joint the edge or use hand tools and provide an edge detail to the outside of the frame. We used a roundover bit on the router table.

Finally, you can measure, and cut miters in the frame pieces so that they fit around the plywood. Once you have everything fitting properly, glue the frame pieces into place and use some brads.