Any preference of a product for getting that castor/synth oil off after a flight?

And, yes, the Army Aircore Cub flew like a homesick angel! I had no idea what to expect as I built it with no outside help or advice. It took me most of the day to break-in the new engine (OS .46 FX) and align and tweak the radio, servos and trims. But by mid-afternoon, with the help of some fine (and patient) gentlemen at the Ross County (Ohio) club, she took off like she was going home. I got in one nice, long flight before I ran out of receiver battery juice.
I got the .46 FX after reading here that a non-ball-bearing .40 might not be enough motor. With the 46 FX, it jumps into the air at half throttle, running very rich, on 10% nm, from long grass.
A public thanks to Tim, Dave and Steve who got me in the air, not to mention back home in one piece.