Kantare EcoLine guitars has coating based on shellac and carnauba wax. Natural, eco-friendly. Light and vivid. Compared to usual thick, glossy polyurethane (PU) coating, it allows wood to look and sound like it’s meant. Naturally.
Shellac and carnauba wax are both totally natural products. Shellac comes from Asia, mainly from India. It is resinous secretion of a small bug, and it has been used by humankind for milleniums. Shellac was one of dominant wood finishes until 1930's. Nowadays it is still the most valued varnishing of stringed wooden musical instruments.
About shellac you may read interesting article from Wikipedia