It IS surprising Boeing went as far as to paint them .... one would figure Boeing would have realized much sooner in the process that structural parts were missing and donated them to museums, or trade schools.

Wonder if it wasn't until the fastener issue was discovered that they learned bonded structural members were absent? Or maybe Boeing figures they will eventually engineer mods and finish them.

Some of the ANA airplanes in use are flying with structural reinforcements which of course add weight.