Painting Without Removing Engine

When I had my car painted we did not paint the engine bay because, like someone else noted, my painter didn't want the hassle of pushing it around. So I tried to paint it later with the engine in the car.....Mistake. I just pulled the motor last month and am in the midst of cleaning, sanding, and prepping for paint. I totally regret not doing it right the first time. Just like anything else in life, you'll only get out of it what you put into it!!