Whipping is the process of binding the rope to stop it fraying. It's very easy to do. For this instructable you need very thin twine or whipping string and an end of sisal rope.
Sisal rope is a natural (hemp) fiber rope.
Step 1: Starting Out
The west country whipping requires two knots, one you're be familiar with when starting out tying your shoe laces. See below image and once you've done it. This is an overhand knot.
Step 2: Step Two Is Like Step One, Which Is Also Like Step Three
Step 3: Three Is Like Step One
Step 4: Tying the Reef Knot!
To start, as you did in step one (and the pic in step 3) , tie an overhand knot (right end over left) then reverse the overhand to finish the reef (left over right)
You'll end up with the below!
Step 5: Finishing Up
Finish by trimming the rope, leaving enough to slightly fray which will put pressure on the whipping.
As you can see I've not nail varnished the knot yet (in a scout hall of boys, there aren't many vials of nail varnish unfortunately or fortunately depending on how you look at it) and I've started from the bottom and finished at the top which is OK, just unlikely to be as strong.