wasn't he screaming and cracking his bones while queen gradually squeezed him? and the reason he was shocked against Vergo is coz sanji thought of him as a pushover (like mentioned in the anime)
but you are right it seems that he used it after his exoskeleton kicked in but he still broke brones and endured the squeeze didn't he.. and its not like the PU came up with a free stack of pain killers ye.. sanji is pretty stoic and resilient even after his bones break like using his cracked shin against an annoyed vergo..
so the pain tolerance is there and he did break numerous bones in the process.. basically what the thread is about
But his bones weren't breakable anymore.
The point of this thread is that sanji endured pain of broking bones, not enduring pain.
Sanji felt the bullets from the fodders but it wasn't pain from from holes to his body.
Sanji felt pain when queen was slamming him to the walls but his head never broke a bone as we can see in those panels.
We cannot take those injuries as injuries to normal sanji because he was way past that.
I agree that sanji is a tough dude but those scenes had nothing to do with it.