The mom of the kid I'm making a CBG for doesn't want it amplified. I've done some research and tinkered around, and I think the thinner bottom of the box I'm going to use would make the tone/volume better for acoustic. Therefore, I'll attach the neck through and connect it to the bottom, not the top, of the cigar box.
Of course, the bottom of the box is plain ugly, just wood with a few stamps on it. If I paint it, would the paint enhance, limit, or do nothing to the volume? I once had a painted cardboard dulcimer from Backyard Music, and it was pretty loud...
A thin coat of paint should make not much difference at all. IMO!
Will painting it affect the sound? Yes. Will you notice the difference? Probably not.
Go for it.
I'll give it a go -- thanks you all!
Maybe I should go for a rainbow assortment so it makes a really melodious din stew?