Hi Blu,
A very fine keris indeed. I really admire it. I think if the blade is stained properly, it will reveal the wengkon plus perhaps some pulo tirto. (just guessing) I have a keris that seems to be made with almost similar material. It was already stained when i got it from Adni. Due to some reasons, i cleaned the staining and the pamor that were used to be very revealing turned out to have almost no distinguishment with the steel. Attached are some photos prior to my cleaning.
Another thing, if u are ready to do some "experiment with the sheath" (which Raja Muda always tells me not to) i think the grain of the wood can be enhanced with a little application of wood dye. However, it the current finishing are original to the sheath, it is not advisable to do it. (which i know that u wont)
I'll send the pictures of the blade after cleaning on Monday.