Nice to see another Aussie on here. Thanks for commenting, I didn't know about 铁布衫, I googled it and found this old movie:

There are many versions of Iron Shirt QiGong technique, some of which you can see on Youtube:

The first video is similar concept to what my master teaches in for the first 100 days of training. We build strength in our fascia tissue and muscles. The next 100 days involved bamboo and then steel brush which you use to hit your body to toughen it. It's not pleasant exercises but I think it is worth it if you can handle it.

Thanks for your support :-), if you still have some witness votes left, I'd appreciate if you consider casting a vote for my witness.