Yes we did! Any organic material shows up pretty well under backscatter X-ray, and so can be used to cover darker contraband. You can see this done with Teflon

Yes we did! Any organic material shows up pretty well under backscatter X-ray, and so can be used to cover darker contraband. You can see this done with Teflon in our gallery: https://www.radsec.org/gallery.html https://www.radsec.org/gallery.html under "Concealing a Knife by Masking". We didn't try meat due to the mess, but it would almost certainly work as well! (Technically, in this X-ray energy spectrum, the amount of backscatter is related to the "effective Z" of the material, where Z is the atomic number of the elements involved. Materials made from lighter elements like carbon and oxygen? Backscatters well. Heavy elements like iron? Absorbs x-rays.)