I took the ground cable from the truck and attached it to the exhaust pipe, the refueller guy took it off and reclamped it to the bolt on the brake caliper
With our wood-and-fabric Jodel, I insist on clamping to the exhaust, as I'm uncertain if wheels have a bond to fuel system, after two rebuilds in her 52/56 year life.(Rebuilt from two crashed Models 30 years ago.)
After night flying on a frosty evening, I bonded cans to aircraft before pouring. No problems.
Sitting in my car, I unzipped my leather jacket. Static electricity sparks flashed.