@jcnaz I dipped them about 12 hours each time. The second dip was actually a little longer and the first a little shorter.
FWIW the black paint removal is mostly on the inside of each wheel, and I am not displeased with the results AT ALL. Folks should just be prepared that as the evapo rust is lifting rust, it may carry stuff with it.
All in all, it is a great treatment.