I don't know if there are any specific studies of disease rates in ski technicians, or former ski technicians. But perfluorinated compounds are known to cause disease (including cancers) in animal studies, and blood studies have shown alarming levels in ski technicians, even months after the end of a season.
There are certainly cases in other industries (such as the Dupont factory workers) who have demonstrably high rates of disease from occupational exposure to PFAS.
The evidence was certainly compelling enough to convince the FIS to ban fluorinated wax, and from what I understand this ban is taken quite seriously. They have devices to check for fluorinated compounds on skis, and even the smallest trace of it can get you disqualified.
There are certainly cases in other industries (such as the Dupont factory workers) who have demonstrably high rates of disease from occupational exposure to PFAS.
The evidence was certainly compelling enough to convince the FIS to ban fluorinated wax, and from what I understand this ban is taken quite seriously. They have devices to check for fluorinated compounds on skis, and even the smallest trace of it can get you disqualified.