Bronco owners are lucky. New fuel tanks are available in a bunch of styles. Exact replacement, increased capacity, etc.
The tank has to be removed to coat it. Why would anyone go to all the trouble to take it out, clean it properly, and coat it when you can bolt in a brand new one?
Lining was developed to fix tanks that couldn't be replaced. It's a band aid solution. If the wrong brand of liner is chosen, or it's not done correctly, it will leak or clog fuel lines/filters and have to be done over. Or replaced eventually with a shiny new tank.
Broncos are popular and benefit from having nearly every replacement part available. Take advantage of this fact.
If my old man was still around, he'd say lining a crappy old fuel tank is being "penny wise and pound foolish."