I had some over spray on a car once. Took it to a shop to have them remove it.
Just like TorchRed6 said. They used a small amount of gas on a shop rag. Came right off. They immediately cleaned the area and polished the area. Paint finish looked like nothing ever happened. I think the key was to not let it sit with the gas on it.
__________________ 2014 Mustang GT Premium
Black with Black Interior, Brembo Front Brakes, 19x9 Wheels, MMD Hood Strut Kit, Sound Pipe Delete, Muffler Delete...Long Mod Wish List!