Dennis Neville's original Hawkman vision included metal wings (the script did say they were made out of "ninth metal": after all, and a hawkhead that sat on top of Carter Hall's head, not covering his face at all.
 
 
 
 
 

From Flash Comics #1.
By Flash #4 Sheldon Moldoff had taken over the artwork and changed the Hawk head into a Hawk mask that enclosed Carter's face.  The wings were now made of feathers
 
 
 
 

From Flash #5.
When Joe Kubert took over the art in February 1945 (Flash Comics 62) he started varying the design of Hawkman's mask, here shown with much more flamboyant plummage from Hawkman 70, April 1946.
In Flash Comics 98, August 1948, Joe Kubert removed the Hawk mask altogether and replaced it with a standard super-hero cowl.  The feature (and the book) was cancelled six issues later.
 
 
 

From Flash 100.