I checked at our Super Wal Mart a couple of days ago and they did not have the marking pens labeled Industrial Use that someone said they had gotten, at the time i wasn't looking for Rub-Dub but think I would have noticed them. A long time ago I was able to buy lacquer pain pens but they don't make them anymore. They would las 10 to 15 years, were wonderful. Donna
Plant tag labels
You can buy paint markers in most craft stores, and possibly in the craft section at wal mart.