Extend a Windowsill: Select plywood the same thickness as sill; cut it as wide as sill and 12 inches deep. Attach bottom of shelf to bottom of sill with 3 hinges: 1 at the center, the others near the sides. Cut 2 right triangles from wood thin enough to lie flat beneath folded shelf; trim tips. Brackets should extend 3/4 of the way across shelf and 3/4 down apron. Hinge brackets to apron. Paint before installing.
I sanded the table with 220 sandpaper and used a white wash finish that I made from 1 part white matte interior house paint to 4 parts water mixed thoroughly. I used a natural wood counter finish called BIOSHIELD. It is made from linseed oil and beeswax. It provides protection without toxicity which is always nice for surfaces your loved ones eat off of