Emery cloth can be purchased in a roll or sheet. I think 3m is the best known maker. Try this site
http://shorinternational.com/Emery.htm . Emery cloth/paper with a penetrant oil of some sort to "wet sand" it will clean your spindles easily. But I would start with a finer grit than 320. personally I would go with 600. I used to use it on piston pins.


1941 AK named "PETEY" my buddy.