Step 1: Materials Needed
To cut I prefer side cutters over knives or scissors for the nice clean cut they give.
Windproof lighters can be found at almost any corner store, the one I have was purchased at the dollar store and is refillable.
A piece of paracord
Step 2: Trimming the Cord
Step 3: Burning the Ends
CAUTION: MELTED NYLON CAN STICK TO SKIN AND BURN
This part requires caution as you need some way to push the cord down to lock the melted fibers into the un-melted ones, I personally use my thumbs as they are very calloused from work but for most people I would suggest using the side of the lighter or another flat object.
As you can see in the picture the area around the burn marks show no sign of blacking from the lighter.
Hope this helps