Double sticky tape it to two popsicle sticks or tongue depressors, or some other way to hold it while honing the bottom of the sticks should go along the line of the original spine and be about the same thickness. OR, I have used a strong magnet as a handle in the middle of the blade to hone enough to get the frown out. Watch your finger getting it on and off.........! Then put it back into the spine and tape the spine to really set the bevel properly.
Take your time and have fun doing it!
Nice razor!
~Richard