His natural varnish is the result of his research and development work of 45 years on the materials, mixing formula and varnishing methods of Cremonese masters like Stradivari and Guarneri.
He traveled along the trade path of the varnishing materials in the 17th and 18th centuries. He combed the areas in Gunea, Ghana, Senegal, Gabon, India, Thailand, and many other countries. The hundreds of materials he tested included the excrement of wild insects, sap of tropic trees, spruce cones, coffee beans and others.
The instruments coated with Andrea Bang¡¯s natural varnish show distinctive ¡®pockmarks¡¯ like those old masterpieces by Stradivari or Guarneri. This shows that the cellular characteristics of the wood have been preserved and the wood is in ¡®breathing¡¯ condition.