The transfiguration of a metal into another chemical conglomerate after it has been introduced to a motor car, especially but not exclusively British, is interesting.
An aluminium alloy whose surface could me easily marked by poking it with a thumb nail turns into a titanium hard substance when you approach it with a drill.
Likewise an 8.8 tensile bolt would neck & fail at the transition from thread to uncut portion long before the proscribed torque setting.
The problem then arises “how the ********+****+++** do I get the remains out.
I do like your use of the word percussive in context, I’ve never been short of big hammers, punches or drifts, however I’ve never before had to dress the raggy arsed ends as often as I have since I acquired MGs.
My wife & I have always been great fell walkers but as we’ve aged we have become fair weather walkers, the shortfall in exercise has been made up by knocking seven bells out of metalwork associated with vehicles.
M