Structured Data Help

Hi all,

A few questions on Structured Data. I run an ecommerce site that sells a medical product.

1) In addition to my Product Page, I have an Order Page, a Product How it Works, and Product Science pages. For the Order, How it Works, and Science pages, I would like to designate these as "Product" markups as I think it makes more sense than labeling them as "Articles"

Any issue with labeling a page as a "Product" even if it is not truly a product page?

2) I do have many blogs that I am using the Article markup on. For the "Article Body" field, is it ok if I just put in a summary of the article? Or is it only effective if I copy/paste the entire article in this field?

3) I'm confused by the "Article Section" field. What do I put here? My blogs are divided into categories based on topic. Do I put the topic in the Article Section?

4) In general, I'm wondering if Structured Data can only help you? If I don't include an article body, and don't have product reviews in the markup, will I still get a positive effect from Structured Data even if I am just filling in some of the fields?

Thanks.