First, this is one truly simple method for adding character to a Mora blade. Second, using a more shiney stainless blade produces the best results.
The list of items necessary is short and easy to acquire. One More knife, 2 pieces of citrus, oranges or clemantines work best, and a few hours time to allow the process.
I am not sure if this is by definition a true patina or more of an acid etching, but either way the finish certainly has character after the process.
Keep in mind, this is a permanent alteration!
Artisan Tony does a great job in this video of explaining the process and showing off the results. Thanks Tony!
Check out links in the drop down menu for lots more stuff!
Lansky Retractable Diamond Rod Sharpener review added in the Gesr section.