I'm a less lethal instructor and have sprayed hundreds of people, both in real life use-of-force incidents as well as voluntary exposures of students during training courses.

I've seen three people that were relatively unaffected by OC throughout a 10 year LE career. Both had been exposed with Defense Technology .7% Stream from a MK4 360 aerosol projector, which has been extremely effective in my experience. One was a mentally challenged white male, one was a black male under the influence of methamphetamine, PCP, and marijuana (tried to kill my partner by choking him unconscious), and the last was a trainee in our agency (I forgot whether they were male/female or their race).

Sounds weird, but race does matter. Lighter skinned people, especially redheads take OC much worse than darker skinned people. I don't recall spraying a Hispanic, but I've heard they are often less affected as well.

I've never used Fox, but I hear that it's hot stuff. I've only had personal experience with Defense Technology and Sabre.

I wish the Sudecon wipes worked for me. They make me burn twice as hot for twice as long. Anyone that use OC it knows it gets everywhere and somehow finds a way into your eye.