Instructions unclear. I lit up the local ice cream truck with bullet holes.

Chainmail will work (with a grounding element). Electricity conductive plastics (like mylar) or metals in the clothing that won't be too torn can also work.

In general the goal is to make it so the path of least resistance to the ground is not through you.

At least that's what I'd say off my experience using electricity to induce pain in people recreationally

Nothing would happen... The circuit is between the pads on the gloves, you'd have to complete the circuit going through the brown shirt to do anything unexpected... Which is entirely unfeasible in any real world situation

If your clothing is conductive, it's just going to mostly flow through your clothing. Depending on thermal properties and how much current these gloves put out, it might heat up the clothing enough to cause burns