The pattern (either ‘browning’ or ‘black & white’) seen in damascus barrels is related to the different rate of oxidation of the very low carbon steel (rapidly rusting and black) vs. the corrosion resistant wrought iron (white) when exposed to a mild acidic solution.

Drew I appreciate and have read all I’ve found on your posts here, on other forums, and anything you’ve provided links for regarding Damascus. I completely understand your response here. Thank you.

Bill,
After some eight years of down time, I've a few sets of barrels to finish. I've switched to Laurel Mountain Forge Brown and Degreaser. Do you dilute it? Do you do a light etching with either Ferric Chloride or Sulphuric Acid? How about Logwood Boil and Ferrous Sulfate and Potassium Hydroxide? I was going to etch until I get the color I want then boil in distilled water. What has been your script to a good black white finish.
Thanks,
Harry