All this talk of wire wheels,paper towels and cleaners leave me ,been down that road many years ago . A quality ultrasonic (heated type) makes this task a non task,15 minutes gets even the nastiest bolts,brackets,or other small items clean as the day it was made. Yes, it costs a little up front but in the long run,if you do much work it really frees you up for more important tasks.http://www.lrultrasonics.com/