Great suggestion. I actually have a gun cleaning kit in my garage with various size bore brushes from 22 caliber rimfire up to 12 ga shotgun. I use that kit more on garage projects than I do on my actual firearms.With discussions about wheel alignment, removal and the like, I got to thinking about stuff that's helped when I've worked on a bike of my own. Pull an axle or two and you may very well find one that was under-greased from the factory (if it had any grease at all!) and has corroded with a fine white powder/crust or even good old red rust. That can make getting an axle out a pain and reinstallation no fun either. I've used a Scotchbrite pad, wire wheel or even fine sandpaper to clean it off the axle.
What about the steel spacer inside the hub between the bearings, though? If the axle was boogered up, that spacer's got some grunge inside it, too.
Enter a cheap solution: A shotgun bore brush.
I'll put a little WD40 on one and run it through the wheel a few times then follow it with a "snake" of old rag strips or paper towels.
It's a thing my old mechanic buddy used to do that I picked up.