

Road signs, like Stop signs, Yield signs. They all use lead as a primary ingredient, I think Chromium is the other metal they use. It’s durable and the Matte-Metallic finish makes the sign easy to read in all lightings. You can still get lead as an additive to oil-based paints, but it’s heavily restricted. You’d have to have a specific use case to import it, it’s called flake white. Metal additives change the texture and reflective properties of the paint, lead is mostly swapped out for zinc and titanium now though.
What did he do with the wrong ones?