Warren -
The factory used semi-flat or satin black paint, over underbody "schutz" (Wurth still sells it) for texture, over primer.
With yours, in Scotia & salty roads + humidity:
- I'd suggest that a 2-part epoxy primer over clean metal would be a good starting point
- then have some reference original parts &/or photos of the texture - & practice on scrap metal or something - to get the original eggshell or pebble texture
- then top coat with the satin or semi-flat black enamel paint.
Its the same satin or semi-flat black paint color & texture for both L & R Rockers and F & R Valances, & for the FG top, but that's not metal.
The Porsche 914 Factory Manual has that & tons of other info, & you can get digital scanned versions on CD from AA & maybe other sources too. It also has the factory texture & paint info.
There is also more on doing valances & rockers in topics in the O&H Forum FYI.
Also - if you're okay with the PORSCHE side-stripes (positive for 1970-74 or Negative for 1974-76 or personal preference) - you'll find that adding them to a 914 makes them look lower & longer visually, which was why they were so popular.
Tom
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