Pottz - at 5 or 6 ft they're not noticeable unless you know what you're looking for. But no matter how far away I am, I can still see them in my mind's eye. 😀
Splinter - thanks for sharing your veneering experience. I definitely can benefit from that. I did apply a piece of veneer tape to my test board so I could see if any glue residue would still be present after sanding. I did find that while sanding, there was a point where I couldn't see the polka-dots from directly above, but I could see them at a shallow angle. So I know to be watching for that. I'll also be cleaning the surface with some mineral spirits prior to finishing, and hopefully that will reveal any remaining trouble spots.
For wetting the tape, I setup a shallow container (1" deep or so) with a damp kitchen sponge in the bottom. I could pull the tape with one hand while the other pressed the tape lightly against the sponge. Worked great.