It is not difficult to recover an old, derelict wok which is rusty and dirty and has not been used for a long time. Using a wire brush, steel wool, scrapers and any other implements you have handy, clean out any dirt, rust, and grime from the inside and outside of the wok. It doesn't matter if you use soap and abrasives like steel wool, as your goal is to do whatever it takes to get rid of the layer of rust and grime before you re-season the wok. When you have the wok cleaned up, just use one of the methods for seasoning a new wok and voila! - a new wok from an old wok!