Just thunked of something, don't use duct tape as it's probably conductive.......they usually have some aluminum and other powdered metal in the silver part.

I've seen wacky ass hot rodders paint their engine silver and proceed to get it all over the spark plug wires----then they'd bring it to me to finger out why it runs so bad.

Ummm, does conductive paint and spark plug wires sound like a good combo to you? Spark scatter everywhere! A new set of wires and all was good again.

Anthony