Originally Posted by SRCRS
So I was wondering about wood fillers. What different types are out there? Should I use a specific type for a lighter wood or for a darker wood (Granadillo by the way)....
Granadillo is such a beautiful wood! It is your bass, and your creation to do with as you see fit, of course. If you like that billiard-ball smooth look, then fill the pores.
If you match the color of the filler to the color of the wood, the results may be a bit bland, which might be OK if your design has other attention-getting features, such as a bold outline and contours, hardware and pickguard styling, and the like.
If you try a jet black filler instead, you may get a pleasingly subtle mottled look that calls a bit more attention to itself but is richer looking. So, experiment with those options.
I think that a lighter filler would call attention to itself in a negative way as a somewhat foreign intruder into the wood (kind of the "pickled" look), but that's just my opinion.
However, before you do decide to fill the wood, consider this quote from the great artist-level master woodworker Tage Frid: Take a piece of wood - plane, sand and oil it, and you will find it is a beautiful thing. The more you do to it from then on, the more chance that you will make it worse.
I believe that several different species are sometimes labelled granadillo, but most woods I have seen labelled as such are really beautiful, and would look just smashing when smoothed and oiled.
So, I would suggest that you take a surface that is likely to be machined off during construction, and plane and smooth and oil it and really polish it up to a nice shine (you can add wax if you like), and see how you like it.
(In fact, there are some naturally oily woods such as some rosewoods and cocobolo that I have finished as follows: smooth the wood and polish vigorously with 4/0 steel wool. Done. As beautiful as possible, IMHO!)
I think that many artisan-level woodworkers would agree that an oiled finish with open pores invites touch. You see it and you want to touch it. That's a nice attribute for a musical instrument!
All IMHO, of course.....