>>491213You will not regret it. I too have had Opinels for years. I usually patina mine with warm vinegar.
However, the knife need some work before it get's good. I take mine apart and put the wooden part into molten candlewax. The wood will soak in it and will be waterproof. It will open smoothly, forever.
Then i patina the blade and put it back together.
Pic related, freshly prepped Opinels.