In another life, I worked for a business that scraped textile equipment. From that I have learned you have to be very careful with coated wire. The scarp yards around here will cut you based off what the yard guy perceives to be the weight of the insulation. (they always way over cut you for insulation) The best way to go in is with wire and no jacketing. Call ahead to verify a price, or get a guestimate of how much that insulation will cost you.
Better or worse yet, burn it all and pollute the environment. Then you will have #2 copper. A bit lower than #1, but worth a whole lot more than insulated. Just remember, don't breathe the fumes. (and no I am not advocating burning the insualtion off, just being sarcastic)
c2500