The grease fitting on the outside end of the emergency brake cam shaft was dropped. My 29 Roadster still has the grease fitting. I do not recall the service brake cam shaft as ever having a grease fitting ?
I know from taking apart backing plates, both front and rear,
that most of the brake parts, including brake shoes, have been a grease mess from leaking seals and over greasing. The brake shoe dust and grease and oil just make a mess.
Most of the interior working brake parts are cad plated or blued and really do not need to be lubed. Just my opinion.
Ron