[I do use affiliate links and there are some in this blog post.]
In my tutorial I make a moon-themed art journal page using acrylic paint on the Yupo. I do love the effects you can get with Yupo, look at the cool texture! It is such a fun surface to play on and the paint reacts differently to the smooth synthetic paper. You don't have to use acrylic paints it takes other materials like watercolour well too.
If you want to see more then see the full How to Make A Yupo Art Journal Page tutorial on the Blitsy Blog.