I did debate "forgetting" to remove my jacket as I walked through the airport scanner.
"Oh, did I forget to remove some metal? Ah... that would be my OFFICIAL JAXA BADGE! BECAUSE I'M REALLY FROM A SPACE AGENCY, AND WHEN YOU PULL MY WEIRD LUGGAGE FOR INSPECTION, IT REALLY IS AN ACTUAL ASTEROID."
I resisted. Narrowly.
And... nothing.
No beep.
The protective case slid through the x-ray scanner without further comment, and the grains were perfectly fine.
My kindle had given more trouble the last time I travelled.