What is the best way to amend an answer once its been resolved?

Sometimes when my answer is picked as "best answer" the asker will ask a follow-up question or need extra clarification or information. I've been adding the amendments to "comments", but I'm not sure if they actually get read by the asker. Is there a better way?

Scott Stevenson-Done with Y!A2010-12-16T03:01:32Z

Favorite Answer

If the person allows e-mail or IM, you can always do that.

If they don't, comments are the only way to do it.