If there is wear on the Bendix you can also usually flip them over. The trailing edge is never meshed with the flywheel.
If you didn't core exchange might find a nice semi permanent home in your garage attic for an "I.C.E" starter.
When I replaced my alternator two weeks ago I had a strong suspicion it was just dirty brushes but I couldn't get into the VR without removing the alternator.
Damn if I wasn’t correct and bought a new alternator when it just needed a shot of brake clean.