I decided it would be faster to color as I usually did with one color at a time rather than one object at a time. This is how I typically think. I usually have an idea as I put the image together what colors are going to fall where. So, I save a little time by going around and dropping that color in everywhere I think it belongs. I can then change my mind later on as the image fills up. Initially, I was worried about the file overloading, but that doesn't seem to be an issue.
If you want to add your support, you can always buy one of my many movie-inspired items at my online store.