I have stripped down several rods, rewrapped them, and replaced the cork and reel seats. It is actually pretty easy and can give new life to an old favorite rod and often improve it with better quality components.
I use a hair dryer to soften the epoxy, carefully cut surface of the epoxy with a razor blade, use a toothpick or bodkin to lift the thread and unwrap it, and clean things up with alcohol. If any epoxy is left on the blank you can often get it off with your fingernail. Lots of ways to do this, that's just how I do it.
For the cork I cut it with a razor then break it off in chunks. Most will come off easily, leaving pretty much just the epoxy. This can be scraped off with a little heat and something hard but not too hard. I use a bamboo shishkabob stick. I don't worry about getting it all off, just most of it, and you can sand it a little if you want. This is under the handle so it doesn't matter what it looks like.
To removed the reel seat you can use heat if you want to save the seat. I have done this, but now I just cut the seat lengthwise on two sides with a dremel, break it off, and throw it away. Who wants a crappy old seat on your "new" setup anyway.