I don’t see why it would have to be taken apart, offhand. My friend is an expert refinisher of antiques, and yes, the problem is removing the previous finish and making sure the new finish doesn’t react with the remnants of the old. They have to be of the same or compatible formulation. I think anyone who does museum-quality restorations could do it, if there is one in your area, or a violin-maker, but you may not need to do anything at all. Let it continue to dry, it can take weeks. Wood and finish dry at different rates. If you polish a harp, it takes weeks to fully dry.