When I first joined Boeing in 1977, Braniff was taking delivery of a large batch of 727s. At that time, Braniff aircraft were painted in solid colors (most a bit garish) with the slogan of "Flying Colors".
The 727s had the "Flying Colors" slogan painted across the center inlet on the top of the fuselage. It didn't take long for the mechanics on the Renton flight line to figure out there was an access panel where the 'l' in Flying Colors was painted. That panel was left off whenever possible, so that the slogan read "Flying Coors"...