I have carefully sanded and used fine steel wool to take the gloss off of Monocote, and I shot Warbird Colors paint, a latex based paint, on it. It has stuck well for a couple of years now, and hangar rash is easy to clean up and shoot over. You can see it on my models section under my name. I don't know offhand if they have a gloss paint, or they may have a gloss clear to shoot over the color.

http://www.warbirdcolors.com/