@JimS - Thanks for the advice - just as a matter of clarification, are you saying to make a bridge using the wire-wrap wire? I'm presuming here you also mean copper wire.
Yes, bridge over the open connections with the wire... but I'd probably follow the open traces back to the first component on each end (or via hole - those little spots that let a trace go through the board) and connect those. It's easier than trying to scrape the coating off the traces and soldering a wire directly to them.
Yes, copper wire. The wire-wrap stuff is just 30ga (don't know what metric folk call it) insulated copper wire, pre-tinned.
