i had some gaps between pieces of my last inlay project (there were a lot of odd contours and radii). I used Gorilla Glue in the joints, knowing that it would just foam out during cure and could be trimmed later.
What I found was that after trimming, all of the little foam-out pockets leave a very nice catch for sanding dust. I did normal finish sanding, the pockets filled with dust, and I was able to apply my lacquer with no need for additional filler. The color match was perfect, since the dust came directly from the finished piece. You could not do this with normal yellow wood glue, which leaves a fully filled, smooth surface after trimming that is difficult to hide.