Is there a way of completely sealing a charcoal drawing on paper with spray resin varnish so that it could be handled without losing any of the detail? - Quora
3 Simple Ways to Stop Oil Pastel from Smudging - wikiHow
Fixative - To Use Or Not To Use? - Pastel Today
Fixatives Are Not All the Same - Jackson's Art Blog
Fixatives Are Not All the Same - Jackson's Art Blog
Let's Talk Layers: Using watercolor pencils and wax colored pencils together – The Frugal Crafter Blog
I've changed my mind on Fixative
How to seal a watercolor painting
Painting My World: Pastel Q & A Do You Use Fixative?
Painting My World
These Are the Best Spray Fixatives to Stabilize Your Chalk and Charcoal Drawings