This is a short advertisement for A Craftsmanship online class that covers the preparation of all the surfaces that an artist might want to paint on. This is an online art class offered at the Art Apprentice Online school.
This short clip is an overview of the class content.
Valuable class for the beginner painter just starting out and learning to paint.

http://store.artapprenticeonline.com/categories/Online-Art-Courses/