Just superglue a ball bearing in there as another option.
Acetone will dissolve it in the workstand at home (make sure it's the 100% stuff), though will take about 20 mins with some fettling to get the ball bearing out. No thief gonna wait that long.
In my experience it gets stuck fast if you've put the right size bearing in there. Even with solvent you'll need a sharp point and some fiddling to get the sucker out of there, a magnet isn't much use.
Just superglue a ball bearing in there as another option.
Acetone will dissolve it in the workstand at home (make sure it's the 100% stuff), though will take about 20 mins with some fettling to get the ball bearing out. No thief gonna wait that long.