Glued 4 pieces of 4'x4' composite beadboard with 6"x12" 1/2" MDF mending blocks glued each half. Trimmed target pattern with razor knife. Painted bullseye to left end. Rolled remaining 1/2 gal gry floor paint over 4'x12' right section.
Ripped 2" backing boartds glued and screwed behind the 16' top and bottom sections. Cut 2-1/2" strips glued between edge and mending plates.