I took some things in for plating to Elliot Fitzpatrick last week, marked out with Lacomit as usual. They returned the ring I wanted black ruthenium plated, as they said that Lacomit isn't strong enough to withstand ruthenium plating.

Anyone know what I should be painting something with to get parts plated in black ruthenium. I asked them if it would be the same issue with black rhodium but they don't do rhodium so couldn't tell me.

Google has been so far unhelpful!

Thanks