I have done a few, messy but worth it if you have a lot.
The windings sometimes have a mix of Copper wire & Ali wire, its easy to see if you cut thru the windings.
Its a bugger when you find the Ali...... dammit!

I cut off one end of the motor windings & pull the wire out the other end.
Theres bits of copper pipe & some brass fitting bits as well.
I have yet to pull apart a bigger 3 phase one though, that'l be interesting..