Here’s how to get the ferrules into a Telecaster without chipping the lacquer. This only works for guitars finished in nitrocellulose.
The heat of the soldering iron melts the lacquer which also acts as an adhesive holding the ferrule in place.
You can probably see from my shaking hand that I’m exerting quite a bit of pressure with the iron.
To remove the ferrules, heat again with the soldering iron and they’ll pull out easily.