Years ago I designed industrial cleaning equipment made of stainless steel. This is what we found to be the best cleaner and finger print remover.
https://www.sheilashineinc.com/
The tape on the rear quarter panel looks to be for strategically located strain gauges. The “exoskeleton” is a stressed member and they are doing system level verification Under towing loads.
I’m sure there are test points that will have that trailer at, or over, the max tow capacity.
The discolorations on the door might be a type of protective film to be removed later. The fact that the dark areas are specific to the door could be its applied before and color occurred assembly.
Looking at the latest images of the bed, it appears it’s around 72” long at the bottom. The wall track rail is probably an aircraft seat track interface with 1” centers. I count around 61“ of seat track, 3” to the tail gate and 8” more at the forward portion. That’s right at 6’
I’m sure...
New member here! Ordered a tri-motor. And my son order a dual motor. Our Silverado is 20 years old and we plan on the Cyber replacing it.
Looking forward to commuting via the sun and telling OPEC to kiss off!
David