same way you get to Carnegie Hall....practice
Ceramic sticks, hard Arkansas stones, diamond dust sticks, sharpening steels, kits like Lanskeys etc all will put a fine edge if you know what you're doing. I use a diamond stick mainly and just try and slice a thin slice off of it. Get some rhythm going and a few seconds is all it takes. If I really had to shave with it I'd strop it on leather just a bit and have a styptic pencil handy .