Can a person change her caste in Hindu religion like from scheduled caste to goldsmith?

Legally, the caste of a scheduled caste woman would change automatically when she marries a person belonging to the goldsmith caste.

A Scheduled caste woman can't change her caste by learning the rituals of the Goldsmith caste because her Varna would reveal that she doesn't belong to the Goldsmith caste.

It is not possible to discuss the difference between the scheduled caste and the goldsmith community and how a scheduled caste woman can acquire the goldsmith caste because Answers.com would flag the answer because the answer would discriminate people belonging to two different Varnas.