noob here. any more I can do to these motors to increase value? pics included

Here's some pictures of what I'm working on:

http://imgur.com/a/5qQp1

Is there an effective way of taking the copper out of the armature?
The two large motors still have the windings inside the case, any tricks to taking them out?
The one winding I did get out of the case was a smaller motor, and I cut the case in half (it was an aluminium case that I wanted separate), any way of getting the copper away from the metal ring it's in? (pic 1)
The fields from the motors are covered in some kind of plastic and I can't knock the steel out of the middle (pic 2), any tips for getting these apart?

Thank you for your help!

Hope these will help some as we cannot see the pic's yet.

http://www.scrapmetalforum.com/scrap...otor-core.html

http://www.scrapmetalforum.com/more-...ic-motors.html

http://imgur.com/a/5qQp1 is where the pics are. not sure when I'm allowed to post pics/links, didn't see anything in the FAQ yet about it.

that's a good video. these windings are way too big to put in a vice so I'm not sure how I'm going to pull them out like that but I'm definitely going to try.

The general opinion is if these are large motors, couple of horse and above you'd be better off selling complete as the copper percentage is low compared to overall weight.