I have the same issue.I noticed it whilst trying the one I fell in love with (see previous post) and it did get in my way.
I am looking to maybe put something on there but dead scared to use anything sticky on the laquer.
I am being lazy here ...I haven't checked back this thread, but if it's not on this one,I know I read someone's suggestions for stick on marker material.
And it's also strange how they did orangey fingerboard markers. I have read that they were white when new (some kind of compressed cellulose) but very quickly went orange from finger oils and oils from the rosewood.
So technically they should be white...
I think they look nice and ' vintagey' ,as old ones always have this feature.
Keeping my fantasy that I went back in time to '63 and bought a new one, I now imagine mine had been played in the shop until they went yellow. Maybe by someone great. If its not sacrilegious to bring him into the fantasy while I am at it,maybe a certain Mr. Jamerson stopped in at the store and broke her in for me!