Refinishing
– using lacquer:
With time, the cabinet of the piano may lose its luster and original beauty, therefore the original finish has to be completely removed. The veneer and the wood work has to be repaired, then stained to the requested color (shade) and then all the surfaces can be sprayed, first with sealer, and then many layers of lacquer. After several weeks of drying, the piano can be hand-rubbed.
– using shellac:
As part of my original training over two decades ago, as an apprentice, I also had to learn how to refinish a piano completely with shellac, in color or in ebony, either in high gloss or satin. From the 16th to the end of the 19th century fine furniture, as well as pianos, were refinished with such technique. I have references and additional information so upon your request I can provide them.