David always uses permanent pens on chalkboards for longevity. When your boards need updating again, they're painted out with fresh black paint. David can paint out your old boards upon arrival, or you can paint them ready for him.

If you to prefer to prepare them yourself David recommends using two coats of black masonry paint with a 4" fluffy roller. It's a lot cheaper than chalkboard paint, dries fast and is much smoother to write on than emulsion. When you're done you can store the roller in the paint ready for next time.