Basically where the arch meets the plastic sideskirt, its as normal as any arch, but as it goes up and under the arch instead of being a visible arch lip, it bends inwards into the bodywork, so it looks like its got an arch lip from the bottom side by the skirt then it tapers off and dissapears and you cant see it,but if you look and feel inside the arch the arch lip is there, its just bend inside the arch.

I took a grinder to mine the other day to remove the surface rust and hammerited it, good as new (black car so cant tell difference) ill get a pic.