Found an old demijohn of ginger wine with a dried up airlock. Smells completely oxidised - total sherry bomb!
Haven't brought myself to taste it yet but is there any way it could be rescued and used as a sherry?
I doubt it.
It's like thinking "my bread's gone stale, can it be rescued as cake?"
Taste it. See what's going on.
If it's too bad to taste, dump it.