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FYI, not wanting to get into a urine contest, but when I mentioned the weight on a 747, that includes the part(s) of an airplane that only a mechanic would see, i.e. say the "46- Section," of a Boeing 747. The 46-Section is approx. just after where the wings attach to the plane, and goes to the rear of the plane, just before the "Tail {Vertical Stabilizer}-Section."

This section alone uses 80 gallon's Boeing "702 White," two people to spray, in an 8 hour bar to achieve completion. this is done pre-assembly. (Two part paint, so multiply 80 times two.) One part paint, one paint hardener.

The 44-Section, basically where the wing(s) attach to the airplane, use's 60 gallon's Boeing "702 White, two people to spray, in an 8 hour bar to achieve completion. this is done pre-assembly. (Two part paint, so multiply 60 times two.) One part paint, one paint hardener.

The 41-section, i.e., the nose section uses most times 60 gallon's Boeing "702 White, two people to spray, in an 8 hour bar to achieve completion. this is done pre-assembly. (Two part paint, so multiply 60 times two.) One part paint, one paint hardener.

I'm not listing all the part's of the airplane, but again just the "Pressure-Dome," approx. 10 foot dia. Goes between the 46-section and the Tail section, uses approx. 10 - 12 gallons. one person paint job.

Hint, all of the above uses a two part green primer system. All fuel cell(s) (that would be the inside of the wings, and the bottom half of the 44-section) use a special fungal resistant yellow primer.

Not to mention all of the different (Dia.'s & Length's) hydraulic lines that get primed & painted.

I could go on, but this should give a general idea.