Krylon makes a type of spray paint that will paint anything! I love their spray paints. You don't even have to sand it or prime it

I have painted dozens of items ranging from wicker, melamine to plastic with that paint. It's the one that says Krylon plastic on it. Walmart and Home Depot carry it. It is a bit pricier but I have found spray painting is sooo much easier. No brush marks.
I have many projects I've painted on my blog here
Nuestras aventuras en Texas Good luck! And if you have any questions or want to send me a pic of your desk you can send me a DM.

I love painting furniture!!