Bill D. I worked for a while in a sheet metal shop (Puget Sound Naval Shipyard), but we didn't have duct tape then. All rivets, or Heliarc welding for bigger pieces (which uses Argon, not Helium. Helium goes up even faster when its hot, and welds to aluminum just ended up as a pile of amorphous saphire). On something like an aircraft carrier or battleship you can walk upright in the air conditioning and ventilation ducts but you've got to wear cotton booties so you don't dent or scratch).

Wrap duct tape adhesive side out on an empty toilet paper roll, then roll it over clothes to take off the lint.

The government saved millions when duct tape came out because everyone was using that expensive plastic strip electrical insulating tape for taping everything under the sun.