Let me tell you a small story about a B-24 bomber captured in Italy by Italians.
During a raid on the Sicilian city of Palermo on 24th February 1943, the B-24D-1-CO s/n.41-23659 'Blonde Bomber II', of the 343rd, 98th BG 'The Pyramiders' 9th AF. 'Blonde Bomber II', flown by the crew of Lt.Dan Story, was hit in one of the engines by anti-air fire, making it unlikely that they could be back to their base in Lybia, so the pilot decided to set course to Malta, but because of the horrible weather their orientation wasn't the best possible so they landed in an airfield of south-eastern Sicily located in the town of Pachino thinking that it was Malta.
After realizing their mistake they tried to take off but the rain had turned the runway into a bog so the local Italian authorities took the crew as POWs and seized the airplane.
Using the remaining fuel on the airplane depot, the Cpt. Giovanni Raino took off to Catania on 4th March 1943 in order to refuel the airplane with German fuel because the Italian one had less octanes than the American one making the engines to not work at 100% of their capability.
After refueling they had to take the airplane to the test center of Guidonia, close to Rome, that's why he painted white crosses and the Italian roundel underwings (in the pic, the first drawing), however it proved to be useless because the Italian AA didn't distinguished it as one of their own and opened fire. Fortunately for Cpt. Raino, the damage wasn't too serious and he could reach his destination, if only with two engines.
On 11th March 1943 the Luftwaffe applied to the Regia Aeronautica to hand over the B-24 to make some testing in Germany, so on 19th June 1943 Cpt. Raini flew the B-24 from Guidonia to Rechlin, Germany, this painted in continental Italian colours and civilian registration I-RAIN as many propagandistic photos of that year show. During the testings the airplane held its Italian markings and it was damaged during landing after a test flight by the German crew. After that incident it was never repaired because the Luftwaffe had already many other and better Liberators and they rather focused their efforts on other kind of airplanes.
Italy, Consolidated B-24 Liberator: