Originally Posted by bhemry
N but want it to stay black.


Marker machine used to do the black industrial chrome on fire arms but not sure they are in business anymore. Many will do black nickle and call it black chrome but no where near the durability. Here is one place: https://www.arlingtonplating.com/capabilities/black-chrome-plating/ and another where Jay Leno takes his cars. https://www.calchrome.com/black-chrome Let me know what you find out as it has applications for springs screws and small parts not suitable for some other finishes.

I was going to have this done but now think Melonite is the way to go at least for the larger parts.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli