I have to dip my files in mineral spirits to cut the oily dust that loads the file almost instantly. Sand papers don't last long with this wood. I really like the wood because it is naturally stabilized, but you don't get the added benefit of the grain and pin holes being filled for you.
A higher sheen can be accomplished by applying a few thin surface coats to the finished handle. I am finishing one now with 6 coats, so far, of hand rubbed tru-oil. It has a dull luster but the grain shows well and I like it like that for this particular kitchen knife and because the natural oils within the wood will probably never completely cure they may eventually bleed through a solid surface coating (however, I only assume that).
Roger