Eco finish for your psaltery.
Wax is similar in ways to varnish and stain, but offers more protection that most other wood coatings.
When given a light coating of wax, the entire surface of wooden objects is protected from moisture, and it holds the color of the wood for a long time. Wax will produce a deep shine, which is sometimes hard to attain with other products. But there is one problem this popular finish suffer from, it is lack of durability. You would probably not choose a wax finish for a bar top or kitchen table that will be assaulted with scratches, hot coffeepots or strong solvents, but it is perfect for psaltery or similar objects.
While a wax finish can go on any type of wood.