I'm working on repairing my Lionel 6460 Crane car. It was badly damaged in storage or moving. I have been able to glue the cab back together, and am wondering if there is something like Bondo that can help hide the cracked places. Also, the original cord on the pulley is gone. I don't see a part number for that in my Greenburg diagram. It looks the original was thin black cord. Any ideas how it is threaded?