Doug could probably expand on this point as well
the laminations are insulated from each other to keep down eddy currents
when the lams get together and grind on one another you defeat some of this insulation
and i would expect come increase in eddy currents in this area, makes for more heat and
loss of efficiency.
probably never be the same after a rewind, and i wouldn't go to the trouble unless i was on a deserted island
and had no choice but to rewind it.
for the price of a new head it is hard to come out on a rewind unless you value your time pretty low.
after a rewind of the rotor it would need a rebalance anyway probably, adding to the cost or the time
to work that out as well.
if it were just the stator, i would go for it,
but given the fact the rotor took a beating too,, probably not worth the effort.
my .02
bob g