Hi shapingstuff,
On the post editor screen click on the screen options button on the upper right corner of the screen. This will open a fly down menu where you need to check the box next to Discussion.
Once you have checked the discussion box, scroll down and you will find a Discussion meta box on the post editor screen. This meta box allows you to selectively enable or disable comments on a single page.
Uncheck the box next to Allow Comments to disable the comments on this page. Now you can update or publish your page.
Thanks