Zest-It Pencil Blend for Coloured Pencils, Wax Pencils & Oil Pastels 125 ml | eBay
Blending Pencils with Zest-It Pencil Blend - Jackson's Art Blog
Jackson's Art - The smoothest shading results can be most easily achieved by using Zest-it Pencil Blend. It is a solvent that will break down the oil and wax content of pencils,
Zest-it Pencil Blend is very popular for blending Coloured Pencils: how to use.