Chalkboard Paint

For about the last month, we've been using a chalkboard for signage that we made by spraying old particle board (from an abandoned bookshelf) with chalkboard paint. Writing on the surface resulted in less than clean lines, and it was pretty easy to scratch off the paint if you pressed too hard or knocked it. Maybe it needed two coats? In any case, we bought a $10 chalkboard from AC Moore yesterday -- we'll see if this is an improvement in style and clarity.