Opinel's are a mass produced plain jane using knife for the dirty work. In France and other places they sell like hot cakes, they are sold with the idea that they will be used up like a .99 cent screw driver or a Stanley utility knife. Opinel makes something like 7 and half million of these things a year, and ship them to all corners of the globe. Only in American do they get put in upscale kitchen stores and sold as 'picnic knives'.
So they don't take any time to get them perfect, just good enough for the role they were made for. The Opinel is almost like buying a kit car; some assembly required. I have one with a slight warp to the blade, and it makes a bit of a left hand curve as you look down the blade spine from handle to tip. Hasn't affected it in any way, and still cuts like a scalpel.
I'd say use the ever lovin' horse hockey out of it. After all, it only costs what a few cold brewski's do down at the corner pub.