A previous post has been very popular with folks wanting to remove the NavBar from their Blogger blogs.
If you use the new template, for example this blog uses Simple, then you need to do things very slightly differently.
- In the blog, select Template and then Customize
- This brings you to the Template Designer. Click on Advanced, and scroll to the bottom to "Add CSS"
- In the window put (you can copy and paste)
- The click "Apply to blog"
Here's the result: