Only 2 uses I have ever found for it are :-
Periodically un-jamming a Pug 106 ignition barrel (yes, I probably should have changed it !) and cleaning the glass solder collecting tube and metal strip in an electric "solder sucker". It is doubly useful in this application becuase it stops flux deposits and solder sticking both components and makes cleaning much easier.
I've never used it near anything electronic. Contray to a lot of people though, I quite like the smell
