Hi,

This is the inside of a very large old brass Russian samovar (http://
en.wikipedia.org/wiki/Samovar);

http://freeboundaries.com/inside.jpg

What you see is a very thick layer of minerals, possibly 100 years
old. How does one go about removing it?


(Also, I made the mistake of filling it with water is my bathtub and
letting it overrun. Now the outside is covered with mineral-ly streaks
that seem to be completely embedded in the brass. Any way of getting
those out?)

Thanks!

Aaron