Well the job is done. I opted to forgo the JB Weld and instead used a single screw and nut. The skin fits so tightly over the exhaust tubing that all you really need to do is lock it on. Hence the screw. I may take a sharpie to the head if it bugs me but you can't see it from the top anyways.
And yes, the car is FILTHY! It is difficult to keep a car clean around here.