I'll kind of echo the OP's post and add some clarification with what I think may be a similarly intentioned question: the neck I have is maple with a rosewood fingerboard and I'm finishing it with lacquer; for masking the fingerboard is it better to mask everything that is rosewood like I did when I dyed the maple or mask just the top of the fingerboard/frets and let the lacquer cover everything up to where the face of the neck starts? I would like to avoid a tactile line where lacquer ends and rosewood begins, I'm just not sure if masking the face of the fretboard would best avoid that or if I should mask all the rosewood and then just, very carefully, sand smooth the lacquer to meet the rosewood after removing the tape. Any thoughts or opinions on how this would best be accomplished?
(conradgrimmer, I apologize if this is not along the same lines as what you are trying to find out, if so please let me know and I'll delete this post and start a separate thread)