I started this class to learn how to scan and edit full color pastel paintings (which is TOTALLY was useful for - they look great). But in order to practice the pattern making and color variations, I used an old ink and watercolor flower.

The original scanned picture:

I was easily able to remove the warped paper that came through in the scan and the bits of running watercolor. I was even able to remove a petal I didn't love. 

Super useful strategies and fun to experiment with color variations for something like this. Great, to-the-point class.