Duplicate section that needs wrap, add enough ring loops to match number of wraps, chamfer each ring loop (except at ends), scale rings where wrap overlaps, hard edge in between, add an edge in the middle of each section and scale down slighty (to simulate the wrap going over itself). Add some randomness and you're done.…
I often don't model a "proper" wrap and instead use a stack of rings - it looks the same from either side and allows me to mirror the wrap, which is 90% of the time covered with a hand anyways so it's unimportant. The easy way to do that is to take your base handle and use the connect tool to make two new edgeloops around…