For some reason, Painter kept turning all of my layers into gel layers. I'm not entirely sure why, and it's probably my fault. But still, it took me forever to figure out why my sun kept turning greenish-orange rather than the bright yellow I had chosen.
I don't like Watercolor layers, so instead I used crayons (which I like better) as well as oils and then blurred them to make it LOOK watercolor-like.
Also, you become approximately 12x more productive on things like this when Phoenix's "Girlfriend" is playing in the background. Tru fax.