Jennifer Kowalski, 29, and Cole Macdonald, 23, breached the perimeter fence at Stansted Airport in Essex with an angle grinder, then took turns spraying two planes with paint and filming it. Kowalski, of Dumbarton in Scotland and Macdonald, of Brighton, East Sussex, said they had not intended to damage the two aircraft on June 20 last year but both were found guilty of criminal damage. Judge Alexander Mills said there was “no dispute” Kowalski and Macdonald caused the damage, spraying the aircraft with orange paint from a fire extinguisher. “Did they intend to cause damage or were they reckless as to whether damage would be caused?”Barrister Laura O’Brien, defending, said Kowalski had believed the paint could be hosed off the planes. Rebecca Martin, for Macdonald, said: “She believed, because she was told, it (the paint) wouldn’t have stuck to, stained or corroded the aircraft.