I also put a big note in my checked luggage which usually contains hammers, saws, files, and a flex shaft. I even tell them where I am going.
And when I go thru security, I always have my metal (gold and silver) with me and take it out into its own tray. The person says "oh, you don't need to do that" and I say "trust me, you will want to see it". It is always opened and 1/2 the time I tell the person I am a jeweler and they wave me thru. Sometimes I have to explain a little more. I wave the gold and then they get it.
Interesting tho, clearly more dangerous than a box cutter.
Thanks for all the interesting posts,
Esta Jo from Philly