I use water thin CA to repair binding that has separated from the body. Binding shrinks with age and pulls away inside curved areas like hors and waists. I build a padded caul and apply a little heat (very carefully), then gently stretch the binding back to fit. Tape it carefully in place leaving little gaps between pieces of tape. I put a tiny drop of the thin CA on the seam between the binding and wood at each gap - it will wick into the seam and if you are careful almost none will be left on the surface. The drops of CA kind of "tack weld" the binding back in place, I pull the tape and run a very small bead of CA right on the seam using a pipette - again, if you are careful almost none will be left on the outside. You can scrape back the little bit on the outside and shoot some lacquer if necessary.