Might it be possible to kludge a degausser? I'm looking for a
volunteer to try this scheme:

1) Get a 500 ft length of 4 conductor (3 conductor plus ground) # 14
AWG Romex still in the box coil.

2) Configure/connect the ends to make it a 2000' long single wire
bundle of about 400 turns.

3) There should then be enough resistance in the wire to plug it into
the 110 V 60 Hz line for short periods.

4) Remove the compass. With the power on, sweep the airplane
anywhere there is steel, and then step back several feet before
turning power off. Reinstall the compass.

No warranty. Don't wear any watches. Remove all credit cards etc
from your billfold..........

If nothing else, a gun type soldering iron puts out a pretty strong
field above the transformer, but of course it is small and will soon
get hot.