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I bought a bottle of M. Graham Walnut Oil when I first started using oil pastel back in December. The art supply store near my office has 1/2 off all the M. Graham mediums and paints.
Then when I started oil painting in January I used it as a medium - with mineral spirits - for the first three or four practice pieces. The only thing I really noticed was that it took a long time to dry, but that wasn't helped any by the spirits, either. Other than that it helped the 'flow' of pigment just fine. My experience is quite limited but it felt no different than the refined linseed and turps that I often use now for my first layer.
What would be it's advantages over linseed? Less potential for yellowing or wrinkling?
Minh
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