I needed (for my art's sake) to find a way to wash my brushes less often. I came across a group of artist that rarely washed their brushes and instead coat them in oil to prevent them from drying out between painting sessions. For that I needed a slow drying oil. So I did some research and settled on walnut oil.
Walnut Oil Painting Without the Danger of Solvents - FeltMagnet
Refined Walnut Oil, 8 oz. - Natural Earth Paint
500ml/280ml Odorless Turpentine Eco-friendly Linseed Kernel Walnut Oil Blending Liquid Cleaning Fluid Art Painting Tools - AliExpress
5 Steps to Safer Oil Painting - Jackson's Art Blog
Solvent Free Brush Cleaning - M. Graham & Co. : M. Graham & Co.
M. Graham Oil Colours - Made with Walnut Oil - Jackson's Art Blog
Sample Set of 8
Chelsea Classical Studio Oil Painting - Sample Set of 8
Refined Walnut Oil, 8 oz. - Natural Earth Paint
How to Clean Oil Paint Brushes without Toxic Solvents - ARTiculations
Q&A – Varnishing, Walnut Oil, Cleaning Brushes, ABS Plastic Panels, Watercolor vs Acrylic Underpainting
How To Clean Oil Paint Brushes The Right Way
Cleaning Brushes Without Solvents