Up until '56, the Ford cars and wagons used the same sun-visors consisting of a masonite base with a u-shaped tin bracket (stapled to the masonite around the visor swivel-shaft). The outer veneer was made of plain cardboard with minor embossments and color lithographed.
After '56, some models had vinyl padding, but the internal components were similar to previous years.
Obviously, the outer cardboard veneer rots and flakes apart by the time the visor gets around 20 years old.
When I redid mine, I cut out my own cardboard to match the original, made the two bends in the middle (to go around the tin u-shaped bracket) and stapled the top of the halves together. Then painted a coat of wood preservative over the cardboard. I took them down to the local auto upholsterer with vinyl material matching my seats and interior door panels and had them cover the visors for me. Back then, it was very cheap. But it wasn't factory original, nor is any of my car(s) interior upholstery.