I've never "tried" to convert anyone. But I think my example/experience is worth mentioning.
I married my wife three years ago. She knew I had a penchant for sharp and pointy things.
Over the years, I've acquired (and discarded) quite a few knives. One of the knives is a rambo-style knock-off that I only use on our occasional camping trips, for splitting kindling and such.
I leave all sorts of knives lying around, usually on the computer desks and the kitchen table. Needless to say, she often picked one up.
After time, she began emulating me, flicking knives while watching TV, etc. After a bit more time, she began carrying an EDC. She prefers a stud-gator gerber, a kershaw blackout, and a rainbow leek, in rotation, now.
On our last camping trip, she picked up the rambo-knockoff, thumbed the edge, and frowned. She looked up at me and said, "This thing's a peice of ****; I can tell by the feel".
I was very proud of her that moment
MORAL of the STORY: Let your friend handle some quality knives. Mayhaps for a few days or even months. He'll come around.
WayLander