Painting on acrylic

[starjewel.livejournal.com]

Was wondering if any of you ever painted on acrylic before. I just wanted to be sure what type of paint would stick to something like this. I asked Google, but it came back with answers about acyrlic paints themselves. I'm hoping to find something somewhat sheer but will still add color to match the rest of my bathroom.

While I have nothing to share right now, I can promise photos of the finished product if I get some good advice :)