I found this repair on a Stern Stampede Ball Count Unit. Traces are repaired with copper foil tape, and the holes are filled with either Epoxy or Fiberglass Resin. Its a slightly yellow color. You can see through the back and see the traces on the front, so it's semi-transparent. The new copper traces have been soldered to the old on top of the repaired areas. It was working, but I did replace it with a NOS one I found because it seemed a bit too burny for me to be comfortable with in my home.