--I use this simple heat gun for stiff figures. It's not some industrial device, it's just easier to me than a hair dryer since it has a focused end and only take a little bit to heat up. When I say a little, I mean like 8-10 seconds at a time. Used it plenty with zero issues, although I wouldn't blast it straight at a 1/6 headsculpt. Hands/limbs no problem.
You learned how to properly and effectively use it. Good for you. Not so much for others with did with much presumption believing it's easy and simple.