I got to see my tripod last week and the sign base for the project. Brian helped with several tests in “aging” the steel. We tried battery acid poured directly onto the steel. We left part of the steel alone. I should say, he, took the protective finish off part of it, and then torched it. We also took the finish off, poured muriatic acid on this area, and then torched it. One final test was using WD-40 on each of those tests.