This is a slide from a 1951 filmstrip (factory bed shots are rare). Looks all black or body color to me? I painted mine individually but others may have a better approach. The following link is also good for bed information.
https://www.flickr.com/photos/advance-design_parts_co/12315229543/in/album-72157640522200463/
http://www.mar-k.com/index.php?p=tips-and-tricks
These were work trucks so shiny hardware is more the exception then the rule.