Dendritic Steel starting to show a patina. How to clean?

[Macilvaine33]

My kitchen knives are starting to show a dark hue to the blade. What is the best way to treat them and prevent this from happening. They are dendritic steel, and didn't know if this made a difference when cleaning.

 

[chinacats]

I had to Google it, but it sounds like 440c? Should be stainless (emphasis on less). What kind of knife? Do you know the steel type?

 

[Butters]

Sounds interesting. 'Cast steel with late carbides that can act like a serrated edge when sharpened'. If try a fine abrasive paste, and elbow grease to clean the patina. Or just let it develop, as it will only come back again.

 

[Butters]

Large carbides. Not late. They're normally on time as far as I'm aware...

 

[Macilvaine33]

Yes they are 440c. David Boye/Francine etched custom kitchen knives. They are more of an art piece I believe.