From my experience with this plastic I can say it is quite rigid, but has great flexural strength unlike ABS or HIPS. The flex is a lot like PVC and it can be folded back on itself without tearing. It has a waxy feel to it and doesn't like to be bonded. I know, I made some body parts in white PP and couldn't get a permanent fix, and I can imagine paint being a nightmare to stick to it.
Here is a photo of a face plate and abdomen both in PP that I made a good few years back.