Thanks, fender3x, I did manage to resist the temptation to add another coat

I just finished putting a coat of Crystalac grain filler on the front, kind of as a test to see if it caused reactivation of the stain. It did, but not much, and the stain on the front was fairly heavy (I did not give it the same treatment as the back and sides since I will put a decal on the front). Right now, I'm researching the Platina dewaxed shellac that you mentioned earlier. I see it comes in a "flake" form, so I'll have to see if that's something I can figure out how to work with.