We have a 30+ year old Kimball baby grand piano and the finish is deteriorating. The original finish seems to be shellac because denatured alcohol dissolves it. I would have though that it would be lacquer. It also fogs up when washing with a damp cloth.
I would like to refinish it before it deteriorates further. Spraying is too much of an ordeal because it would have to be done in place. I am thinking of wiping on a lacquer to add protection rather than add more shellac.
I recently built a trundle bed and finished it with Arm-r-seal (urethane) and really like the results. I am testing that on a part of a leg that is not visible. I would probably lightly sand (300+ grit) before final application.
Any advice, cautions and experience is welcome.