Font-lock in a buffer inserted in Dired buffer?

[Arthur Miller]

dired-auto-readme.el
Description: Text document

I am opening a file in it's own buffer, and hoping trying to get Emacs
to font-lock it. I am not sure if font-lock will do it's thing when
buffer is loaded or when it is displayed so I am calling
(font-lock-ensure) to get it to (hopefully) kick-in. I see also dired is
trying to font-lock inserted text.

1. what do I need to call to make it to font-lock
2. how do I tell Dired to give crap to font-lock the text after the
   insertion? Can I disable just a region from font-lock?

Thanks for any help!