I’ve had six surgeries that left scars and four that didn’t plus a number of injuries that left scars and embedded metal, etc. I can make it through most metal detectors without setting them off depending on their settings. If I do have to get hand-wanded, it often goes off at odd places.
“Sir, why is the wand detecting metal on the left side of your face and right shoulder?” “Because I’ve got pieces of a helicopter in there.”
You have bits of metal in your face? Jeez