I wasn't able to attend the meeting, but my club had someone demonstrate how they made their own branding iron out of something called nichrome wire (spelling?). I know I used to use that for model rocketry to ignite the motors back in grade school. It glowed red hot inside the chamber of the model rocket engine and ignited it. It was powered by a 12 v battery. I imagine they used a heavier piece of it than we used for that and bent it into a shape of a signature/logo/etc. You might be able to find info on it somewhere online.
I saw some of the brands and they seemed very professional and I thought added a unique identifying mark that seemed to make it seem higher end-that it was worth branding and identifying, not just some generic project.