Here is the finished illustration of Eden Gem Muskmelon:
I think this one turned out pretty well. I discovered with this that the white colored pencil draws over the gouache really well, which was nice because in most of the pictures I saw of these melons' leaves they had a bit of a highlight on the edges. Using the colored pencil looks smoother in the end than scraping off a little paper with a razor.
And.... I have no more to day about that. :)