Before :

After :

How to do ?
This victim is a 40 years old Bina Musicals sitar from Delhi.

What you need is popote and 2 pieces of clean cotton cloth.
Popote is a very strong natural cleaning product, especially made for shellack polished bodies.
It removes all dirt and grease, and makes the polish shining as new again.

Shake the popote very well and apply some on a piece of cotton cloth.

Rub it firmly on the dirty surface. Work in one small zone at the time. As the dirt comes off, the cloth becomes black and the surface looks mat.

Before the popote dries up, polish the cleaned zone with another clean cotton cloth. Then the surface becomes very shiny.

If the result isn’t good enough, repeat the process.

Complete the whole instrument, working on zone after zone.

The instruments’ polish looks like new.