I have been working out on the mines recently and an older driller offered me some of what he called "horses arse cream".
I tried some and it was white cream that had a VICKS like smell, one application lasted all day and had no flys on my face at all.
When I got home my missus went in search and found it a rural supplies outlet through a horse owner freind. Havent got the name at the moent but will find it if anyone is interested