Yeah, I think I'll return to good old ebony. I laid it in alcohol for a night, and most of the resin came out, but now the wood is not shining anymore and it is pretty dull Heh, where did I get the idea in the first place, I don't know. Also, it is not SO heavy, a few grams more than ebony as a fingerboard.
Good idea johnsilver, I'll probably go with the knobs