Sagging  in the center from length wise down the top(running from front to rear) and sagging across the center going (running from side to side) are major repairs. Stiffeners can be used on the inside of the top. They can be either bent 3/4″ aluminum box tubing or number one lumber,1 x 2′s or 2 x 2′s arched to fit the Original Bend(s). Surface preparation at this point is essential. Round off the outside corners of the stiffener because fiberglass does not like sharp corners.

The next step is attaching the stiffeners to the inside of the fiberglass top. Use a total five flat head wood screws for each wood stiffener and five metal flat head screws for the aluminum.  Drill the holes from the outside of the top into the stiffener. Mix up some bondo and apply between the stiffener and fiberglass. Set the first two screws lightly and temporarily using a flat washer under each head to hold in place then set all five without washers. Let set until hardened. Apply fiberglass and resin, smooth, sand and paint.

MORE TO COME!