That is not true. If it was, it would mean the aircraft would only fly every 2 week in combat. Since repainting takes that long with refuels/defuels, aircraft preps and weigh and balance. It took a lot of man hour per flight hour to maintain the aircraft and handful of MARTIANS per aircraft to maintain the RAM/RAS, but not that many man hours.
Highly implausible. The aircraft took a lot of planning, but that would be impossible to plan.
It took parts from a dozen aircraft: A-10, F-111, F/A-18, F-16, F-104, etc.