Old Aug 13, 15, 9:44 am
  #9  
kop84
 
Join Date: Apr 2011
Posts: 3,240
Have a friend who operates fireworks shows around the country. He said he constantly sets off the sniffer machines, etc, always has his permits/ID at the ready. Always plans extra time as he knows he will be going through the drill. Said no matter what, those product residues are all over his belongings. Gun enthusiasts find residue in their bags, safes, etc.
I would have zero trouble believing that's what happened. Put a few bottle rockets in the bag over the 4th of July festivities and some residue is bound to be on the bag indefinitely because its not as though you can throw your bag in the washing machine!
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