How to ignore the template and styles for a single page
 

I am working on adding a forum to a page on my blog. The problem is the template and formatting for the rest of my blog is over riding the forum template. Can I add something in css inserts so that the blog template will be ignored for a single page allowing the forum template to come through?

I know I should probably create a new template and select it for this page but I tried and could not figure out what minimum code I need was. I just got a blank white page