Richard, thank you very much for your insight. You mentioned that artists can run their own tests on materials. How would I go about testing the materials I'm using? I am currently using walnut oil, walnut/alkyd oil, and liquin as medium (not all at once). I've heard some negative things about alkyds and liquin such as delamination and have not worked with them long enough to see those kinds of problems in my work. I'm in the process of researching varnish and can see the benefit of testing the material before committing to it. Does an artist need to try many different mediums and varnishes in order to become well acquainted with them?
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