> > I wish to set the face of the Echo Area.
>
> Not sure what you mean by that.
>
> > However, how can I change the face only a buffer with a given name using
> > face-remapping-alist ?
>
>   (with-current-buffer (get-buffer " *Echo Area 0*")
>     (setq-local face-remapping-alist ...))
>
>
Great idea. Thank you.

I did not notice that Echo Area is a permanent buffer, despite that it
appears all the time via (buffer-list).

I thought that it is killed all the time and re-created after /before each
print0 call...


I was going just now to insert some code in the start hook of
*fundamental-mode*, that checks the name of the new buffer, see if it is
"Echo Area ", etc.

:) I was on a wrong way . Thanks for the quick answer.