Hmm...I guess it may be prudent to try oil first, before altering an expensive knife forever, but my brain tells me that a shrinkage of just .5mm in a wood handle X 20mm wide x 300mm around = a lot of volume to make up for; not sure if wood can even sustain-ably hold that much extra oil? Now, I know Tru-Oil builds up on the surface, so maybe that's different. I personally don't like the finish for handles; I'm more of a naturalist; high grit polish; oil; wax....