Clamp the blade in a big spring clamp or woodworking clamp so you can get to the handle from all sides easily ( A parallel jaw wood clamp works really well). If you are going to make a lot of these, you can make a rotating wrapping stand like the ones used to do sword handles.
Wrap it, and check everything. If it isn't looking right, wrap it again....it won't look any better after the resin gets hard.
When all is looking right, give the handle a flame off with a small flame. This gets rid of the fuzz and loose filaments. Brush it off gently with a soft brush to remove any ash.
Look it over closely for places where strands overlap or have a bad twist. Adjust them if needed. Don't accept a sloppy job just because it will be a necker or camp knife. Every knife deserves a good handle. Hemp is cheap, re-do it if you are not pleased with what you see.
What is really important is to use a thin and clear resin. I like System Three Clear Coat.
Use a small flux brush and apply the epoxy very sparingly. It will soak in almost immediately. Done just right, it doesn't look any different. You don't want it to look wet at all. After you brush in the small amount needed, take a lint free cotton cloth and squeeze the handle. This will remove any excess. Set the mixing cup of extra resin aside to check as it cures. Set the spring clamp so the knife is sticking out horizontal off the edge of the table ( It's a good idea to put some papers on the floor). Let it sit for a few minutes, wipe off any drips or pooling, and turn over to reverse sides. Rotate every few minutes until the excess resin in the cup starts to gel. Once it gets thicker, don't mess with the handle any more. Let it cure for a day or two, and it should be rock solid.
You might want to experiment with wrapping and epoxying some screwdriver or chisel handles as practice. Try sanding some down to varying degrees. You may need to apply a second coat of resin and sand it down on ones you sand smooth. I have seen it done both rough and smooth. The smooth ones look pretty cool. In the end you will have some fancy tools, and be ready to do your knife with some idea of what it will end up looking like.
