That's a good looking bowl and a great idea to add the braided accent ring. Just my 2 cents, but I first thought it looked like a tire track, which I also think would be a great idea. On the basket work I've done I've found that the rim I decorate with a braided pattern kind of needs to be the opposite of precise. I picture a Native American woman weaving and braiding her baskets from natural fiber materials that aren't very consistent in color, diameter, or anything else. So I try not to get the weave and braid burn marks too exact. And then because the real baskets I've seen have cracked and split fibers from time I add a bunch of little lightly burned lines, again not very exact, to try to make them also look old. And then I do the braiding on a round bead at the rim. Adding a similar bead as an accent to just a normal bowl would probably work better on a smaller and round bead. But you know how much 2 cents is worth nowadays.
BTW, thanks for getting the wheels turning in my head with that tire track. That should get some mileage!