I bought a bottle of camellia oil on Amazon to use as a preservative on my carbon steel blades. I learned it also works well to add some water resistance to magnolia sayas. My recently purchased sujihiki came with a chestnut handle and it was very light colored. Four light coats of camellia oil brought out a nice color in it too.
Top photo - out of the box, next photo - after oil.
Top photo - out of the box, next photo - after oil.