2. Place the piece of zinc, 27" × 39", on top, extending 1-1/2" over the
edges all around.
3. Hold the zinc firmly in place and make a square bend along the front
edge with a hammer or mallet, bending the edge of the zinc up under the
top.
4. Punch a straight row of holes 1" apart through the zinc and tack it
on.
5. Bend the back edge, punch and tack in the same manner as the front
edge, but be sure the zinc fits snugly on the top.
6. Bend the ends of the zinc the same as before, but be very careful to
fold the corners neatly.