Painting Trellis Material http://www.durgan.org/URL/?Trellis 15 April 2009 Painting Trellis Many trellises are required throughout the garden. I use 4 by 8 concrete metal reinforcing sheets. This 6 inch mesh material rusts if it is not painted. The pictures depict the painting method. Tremclad rust paint works well, and lasts several years. Maybe some day this material will be painted during manufacture. Rebar and other galvanized garden material is also painted as necessary.