Just saw this thread. I'm sorry that you have to give up most knife making but your health is
clearly more important. Looking forward to seeing what you do for your next set of projects.
Please stay around and keep talking to the rest of us.
I've tried using once so far. That knife didn't work out for reasons unrelated to the bronze. I'll get up to trying it again some day because I really like the color, but it is the hardest metal I've ever filed short of hardened steel.
I agree about the Zknives database, but use their excellent (free!) Android app instead of the
web site. There's also an iPhone version that I used to use before switching phones.
IMO, you really want multiple cuts in needle files. At least something coarse for rough work and something smoother for the first step of finishing it. You'll not be very happy trying to clean up all the coarse cuts with just sandpaper.