There seem to be a lot of answers out there, but this pretty much summarizes them:
First wash as you normally would. If there are still stains, make a paste of lemon juice and salt, apply to the quilt, and let sit in the sun if possible. Then wash.
Here is a link to one of the articles:
http://home.howstuffworks.com/how-to...ew-stains2.htm
Good luck to your friend. Hope this helps!