OK, I've got the front hubs pulled off one of the 124s. Am swapping out some warped rotors and got motivated to clean & repack the wheel bearings. I pulled the ABS sensors just out of curiosity and they are covered with very fine metal shavings. Magnetism appears to be holding the metal shavings in place.

Is this normal? Is there any point in cleaning these things up? If so, what method is the best approach?

Thx,

- JimY