In most cases we would have stripped the wood down to its natural state and applied a time appropriate finish. The problem was that if we stripped the table we would lose all the hand painted details.
Our goal became to salvage the painted details. It involved many, many painstaking days of slowly removing each layer of shellac without damaging the paint under it. We were about 98% successful in saving the paint. We then applied two coats of varnish to protect it.