Marine plywood is constructed of waterproof glue which makes the product suitable for use outside on water. A wooden boat that is in need of repairs requires marine grade plywood. This wood can be cut in the same manner as a standard piece of plywood. Timber yards and home improvement stores carry the type of plywood that you need.
Measure the area of the repair with the tape measure. Obtain width and height to determine the correct size.
Transfer the measurements in step 1 to a piece of paper. Draw an outline with the pencil and then cut it out with the scissors.
Place the template on a sheet of marine plywood. Trace around the template to create an outline on the plywood. Cut around the outline with the circular saw.
Apply an epoxy to the backing plates or frame of the boat. Place the cut piece of marine plywood in place and secure it with screws using the power drill.
Allow the epoxy to cure for 24 to 48 hours and remove the screws from the plywood. Fill holes with a patching compound. Sand the patching compound smooth with the sandpaper.