Engine painting while in the car?

Different Strokes for different folks I guess, it's almost like a hobby for me. But I couldn't imagine put in a billion hours on a head Port LOL
Having the engine out in the wide-open is hard enough to get a good spray job in all the crevices and make it look nice. I just can't imagine trying to do it or clean it or tape it off still inside the motor compartment. That sounds like a major pain in the butt..