Try using some light sandpaper like 200 or so maybe even higher, emery cloth would be good and try to polish it out, your gonna have to clean the crack surface anyway, also you could look into a wear sleeve if there is one available. I've had people at work do alot worse with a screwdriver trying to spin out main bearings. And we just polish them out.

1993 Chevy Suburban 2500- Tow Rig

1991 Mitsubishi Montero LS LWB

SR Parts:
Rear Axle
Coils
Trailing Arms
Front Calipers
and soon to have UCA's and idler arm.
Dual Bouncies
Air Lift Airbags
Aisins
33x12.50x15 Custom Grooved TSL's

Body lift in the near future.