Product safety characteristics

Answer:
Product safety is the new clause of IATF standard, but sure it was a requirement before just spread in other clauses.
The requirement states that all preventive actions that are used as a control of product safety during manufacturing should be included in the documented safety process. So, Anti rust oil applied for the preservation of the part is safety characteristic because it is used to prevent risk.

We suggest following articles for further explanation:
-Ensuring product safety according to IATF 16949: https://advisera.com/16949academy/blog/2017/09/20/ensuring-product-safety-according-to-iatf-16949/#comment-4232137428
-Product Safety Procedure: https://advisera.com/16949academy/documentation/product-safety-procedure/