Chemically removing tea stains from china

From: Maarten D. de Jong (this.address_at_is.invalid)
Date: 11/23/04 

Date: Tue, 23 Nov 2004 17:43:36 +0000 (UTC)

My girlfriend has a beautiful china tea pot which is proving very diffi-
cult to physically clean on the inside. As a result, there is an increasing
amount of tea stains building up there. Is there a way to remove these with
chemical means? Even a partial removal would be an improvement at this stage.

With kind regards,
Maarten