I had decided to repaint the red doors on the kids' Via Toy Box cube tower, and though I had some glossy Ralph Lauren black paint left over after refinishing all the doors in the house, I also had some Yoyamart magnetic chalkboard paint left over from an Ikea chalkboard kids table experiment that went horribly awry. I went with the latter.
The paint is thick, but it doesn't spread very much, so I put three coats on, with some sanding in between. Though the can recommends 120-grit sandpaper, I have to assume that's a typo; it seems like it'd just chew up the paint, not smooth it to a slate-like finish.
As it turns out, the 320-grit paper I used did a pretty good job, and now the doors have a velvety matte finish. The greyish black kind of goes with the dark grey milk crate tower that's now rubber-strapped to the wall, tighter'n The Gimp. It looks so good, I celebrated by breaking out my stash of flat grey nylon shop switchplate and outlet covers, and just kind of going to town. Starts the new year off right.
For anyone worrying about the psychological effects on a kid of an anthracite and black nursery, relax; the framer and the quilter are on your side.