If you need cutting bits, we can help with those - and some help getting started and along the way.
We've owned several different styles of tire cutters and currently have 2 Jones machines in house.
I've probably seen them all, if not used them all at one point or another since we started cutting tires.
I can give you some basics, and obviously do some searching on here for information as there's been lots over the years.
Beyond that, it's personal experience - that's the way you will learn.
Can you guys post a link to the bondo rasp you are using? I have tried using a bondo rasp that looks similar to the one used in this video link below but I am having trouble getting it to cut anything. Are you freezing tire before cutting with rasp?