Just finished painting mine a few days ago. Its a pretty simple process. Go to Lowes and pick out whatever colors you want. Get plastic bonding spray paint. Tape up anything that you don't want painted. Shake the paint realy well and make sure there are no lumps. Put a nice even coat on and let sit for 30 min-1 hour. Put your second coat on. The paint "dries" realatively fast but takes a while to fully bond. I would wait a week if its just sitting around, if you have it near a fan or vent it ought to be fine in 3-4 days.
I did mine black with Lime green splatters so I just put the splatters on after the second coat and let it dry. If you are going to do two different colors I think you would have to tape, paint color 1, wait, repeat with color two, but there might be another way. I would post pics of mine but I have no idea how