I suppose the risk of pollution would be too high, but it'd make for a cool demo. Once on a bike ride, I met a guy who worked painting the GGB. He said he was

I suppose the risk of pollution would be too high, but it'd make for a cool demo. Once on a bike ride, I met a guy who worked painting the GGB. He said he was about 50, but look 65, so it seemed plausible. He wasn't wearing a helmet even on descents, which I asked him about, and his answer was that he spends all day in a harness with hard helmet, so the last thing he wanted was more helmet time in the weekend.