I plumbed the DC8 for about a year. Totally archaic plane, but it was state of the art in the day. Interesting thing, as you could look down the side of the fuselage and it was as smooth as glass. No wrinkles. Not bad for a 50 year old broad. Next time you walk aboard an airliner, look at it like you would a car for wrinkles / denting.
The guys who flew the Eagle liked to brag how tough it was compared to our single engined brethren. I always though if it had come with a hood ornament it would have been a Bulldog (think Mack trucks), or if you scrapped the paint off, it would be yellow and say Tonka all over it. They made tough products, or they rounded up when doing the math...