The second you start to restore a historical artifact you screw up the "ethic" of the object, and it's value to historians depreciates.  
If a plane is going to be restored for flight or museums purposes the best thing the historians and/or techs and renovators can do, is record the living hell out of the object before they **** with it.  If they don't then the value of the object as a historical artifact anyways.  
In most museums they make sure to properly record the artificate before restoring in.  I would be curious to know if Bodhi and his organistion does the same.