The Classic Airframes kit was the basis for this model.  Other than the spar modification, it is pretty well out of the box.  The aircraft was a bomber that had been converted to a transport and used as a V.I.P. machine on the west coast. 

The paint job started out using Alclad II which unfortunately went wrong.  After Bondo strongly suggested a gloss black base, I resprayed using Model Master enamel then while the paint was still tacky, I accidentally dropped some SnJ aluminum polishing powder on the wing...and the rest of the story.....