Another 'Wacky' idea -
assuming they park under trees , tie up balloons full of paint to the branches of the trees , wait until they park underneath , then shoot out the balloons with an air-rifle or similar :bannana::bannana::bannana:
assuming they park under trees , tie up balloons full of paint to the branches of the trees , wait until they park underneath , then shoot out the balloons with an air-rifle or similar :bannana::bannana::bannana: