I was given a pair of Virgils kegs with root beer still in them, and I've been wanting to use them for homebrewing. I was at a brewery tour a little while ago and I was told that it's nearly impossible to get the taste of root beer out of the keg, and that it wouldn't be a good idea to use them for brewing. Is this the case? Is there a way to clean all the flavor and junk out from the root beer keg?
The kegs are in very good condition, I just don't want to put my beer inside something that's going to mess with the flavor.