This bell was covered in black grime when I got it, with only a few traces of color visible. It took two days of soaking to remove the tarnish, another day of polishing to make it bright. I restored the colors as best I could, based on the few dots of paint left. This is the result (I should really start taking "before" pix).
30-40 years old, made in India. 45x60mm. Original clapper, in case you were wondering.
Matthew M. Cariello