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How a Wax Stick Beats Sharpies on Steel
Most people think a marker is a marker. Then they meet the solid paint marker — a wax-resin stick that marks hot steel, oily surfaces, and rough concrete without solvents, evaporation, or drying out. This episode breaks down the chemistry behind these industrial workhorses, from how the binder transfers pigment under friction to why the mark survives welding, salt spray, and foundry heat. We compare the four major brands — Markal Paintstik, Sakura Solid Marker, La-Co, and Dykem — and explain which industries depend on them: welding, shipbuilding, mining, and nuclear. If you've ever wondered…
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