Pete your always about doing things the right way which is not a bad thing by any means…
But take into account the video was shortened up… i doubt there going to show 10 mins of him using a heatgun…
And theres nothing wrong with using the bats/pipes or hammers to roll your fenders, people have been doing it for a long time and no matter what using a bat or a fender roller your still going to crack/chip paint.