I just acquired a bass that has what appears to me to be an unfinished maple fretboard, although it has been lightly stained. My understanding of maple fretboards is that they really need some kind of finish on them. I assume that finishing the fretboard keeps it from drying out and cracking? Not sure what if anything to do about this. Bass sounds unreal and the look of the unfinished birdseye maple it killer, what to do what to do...