I used the "Rich Pins Validator" to verify and enable rich product pins on pinterest. Shopify is setup automatically to use them, but you do have to enable it on pinterest. (below link)
Well my rich pins look good, the attributes seem to be matched right and up to date with my current site info. However, there are only a few attributes being sent to pinterest, just the main attributes.
I would like to utilize the below "product fields" (attributes) on pinterest