How to 'Age' your carbon blade knife - Opinel Knife #8 — Nellipalooza
Using Onions to Patina Your Opinel? – Velo Orange
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Brand new vinegar patina on a trusty old Opinel no. 9 : r/knifeclub
Opinel Knife Collection with DIY Patina Blades - YouTube
International Knife Collectors Association - Opinel No4 Patina Knife Mod #knives http://www.knifecollectors.org/blog/opinel-no4-patina-knife-mod | Facebook