Sewing How to Understitch a Facing Scott Admin posted on 4 years ago — updated on 1 second ago 566 views When you're following pattern instructions, you may encounter a step that says "Understitch the facing." Here's why this process is important and how to do it effectively. sewing clothes Scott Follow Author, educator, musician, dancer and all around creative type. Founder of "The Happy Now" website and the online jewelry store "Silver and Sage".