Shiny ... forgot, the guy used a heavy plate of copper on top of the conductive paint. I thought Palladium was weird too, but it worked beautifully. I actually looked it up ... as I wasn't that familiar with it. It's a fairly common decorative plating metal evidently. This guy was European, and working at home .. so perhaps there was some aspect of using palladium that made it easier to do at home compared to other choices.
He was doing a life size Bobofett helmet from Star Wars ... so, uhh ... not your average sort of guy
Here's the video
https://www.youtube.com/watch?v=vsrlrH3omZc
He brush plated the palladium ... must have 100 hours into that thing.