I posted this before- but again...
Tried to bring back a pound of fluxed brazing rod I'd bought in Kotz (Propane/butane doesn't work!) in checked baggage.. It had flames on the package. Says it could produce noxious fumes at working temp - 1500 degrees).
My contention was that at 1500 degrees the aircraft had more problems than a pound of fluxed brazing rod. TSA wasn't buying it- those flames on the cardboard packaging you know. A few weeks later I threw it into my checked baggage wrapped in Saran Wrap. No problem!
