On brakes/rims. Is there any way to avoid it when riding in the rain? It's annoying, I try to clean it off but it seems to just keep coming off on the rag/paper towel/whatever no matter how much I wipe off the rims. And then as soon as I ride again, it's back. There's also some lovely little steel-wool-like shaving things on the break pads. I'm sure that's a good sign, yeah?