Re: How to replace a cheap handle & Butt?
The boiling water will work on the seat. If you are saving the seat stick it inside a couple of plastic bags. Boiling water and seat finishes don't mix too well. Once the epoxy softens, don't twist when you remove the seat. Easy way to splinter the blank.
As for the handle. There is no way to save the cork, so you can kind of grind it off with some pliers. Once the majority of removed, you can shave it off with a razor blade. Then heating the old epoxy with a hair dryer can help you scrape off the remaining epoxy easier.
When you ream the new handle don't make it too loose. Just go snug, but not too tight. Too tight and you will squeegy off the epoxy and the handle may eventually work loose.