@whostolethebatmobile , stop trying to look like you know what you are talking about.
In the very best conductor surfaces, you are talking surface roughness 200+ nm. With audio connectors, I expect 2+uM. Nanodiamonds are <10nm, so we are talking at least 260+ stacked to fill in the voids (they are round), and that is assuming 100% material, but this is an oil carrier with indeterminate active material, so who knows what you will get. What you won't get is any improvement in conductivity beyond maybe, just maybe, some whiping of an oxide layer, but ... for that you would be much better off with something larger and angular as these would not cut through the oxide layer .. it's a fail all around.