@Troll At the end of every day we washed them. The pilot had to crawl underneath and scrape the oil off before washing the area, under the engine and right along the bottom of the fuselage. Gypsy engines leak a lot! I thought it was very fair that the pilot got the worst job as we had the best job as well. By the time I finished, the rest of the aircraft and the cockpits were done by the ground crew.