Before:

These are two of the most obvious, but they were sort of like a splatter pattern...don't know what was splattered, though. (I know the stains didn't show well in the photo, but they are quite obvious in real life and, even worse, they are right in the center of the shirt so they are pretty obvious.)
What to do, what to do?
Embroidery over the stained area? Maybe, but I wasn't inspired to do it. Freezer paper stencil? Not sure I'm ready for that, but it got me thinking.
After:

What do you think? I love the way it turned out. A clipart of a flower silhouette and and iron-on transfer paper and I gave the shirt a new life. What do you think? I love it and, importantly, Buttercup thinks it is cool.