CDATA Section from JSP/ATG Dynamo

I'm trying to serve an RSS feed from Websphere and the ATG suite of web 
server apps. Since I have the kind of users that can and do put 
Windows-1252 characters into UTF-8 documents, I really need to wrap the 
output in CDATA sections.
I can find nothing in either the Websphere or ATG docs that even 
mentions CDATA. The one or two throwaway mentions I've found in general 
JSP documentation say that the literal '<![CDATA[' should just plain work.
Actually it vanishes without a trace. There are no errors, just no CDATA 
section. I'm very reluctant to put effort into a SAX or DOM 
implementation without knowing why a simple string doesn't work.
Can anyone provide either enlightenment or a workaround?

Thanks,

Frank