You can dunk 'em in boiling water, yeah 250lb dead pig in boiling water, or you can use the burning straw method which stinks badly. And then scrape. And probably either use a brand or a torch to get rid of the hard-to-get-rid-of hairs.
You gotta leave the skin on for bacon or hams. And not cook it in the process of releasing the hairs.
It takes screwing up a few times to gain those skillsets.
/johnny
When I was a kid there was an old couple across the street that had a hog killin’. My daddy dropped them with one .22 shot between the eyes. They had 55 gallon drums of boiling water sitting under three poles tied at the top. At the top of the poles they had a wench, what we called a “come-a-long”, to pick them up with then ease them down into the water. Once pulled out the hair was easy to scrape off. It was a fun day.