Grandfather's Cartoon Painting on a Defiant MK1

Found when 2 years old . Found on Hinkley Road under a Staircase. Grandfather repaired military aircraft. He was not in the military. A piece from a defiant MK1 which landed at Desford Aerodrome shot up in 1942. A Cartoon painting salvaged from the aircraft. The painting was on the original Aluminium skin. In 1999, it was framed and handed down to his Grandson, Mr. David Charles Allman.