Paper casting watercolor paints are some of the best I've tried yet. Found them at a yard sale one day. Have been painting with them in recent years and am very satisfied with the richness of color. I love how vibrant the colors are...with just one coat you are getting some instant gratification feedback on the color.
The materials I've been using lately are a Uniball ballpoint pen, Ink, Sharpie, paint pens, colored pencils, and watercolor paints (and sparingly, watercolor pencils).
You can see more of my work @awesomenezzshizz on Instagram. (Including a better version of the image connected with this post ;P )
Excited to learn! Feel free to reach out.