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You guys are frightening me. I have been using retouch varnish almost each morning at the beginning of my painting day. It brings the freshness of the painting back to light. It is the only way that I can add new paint to the canvas. Without it, the fresh paint looks different than the paint that I applied the day before. Especially in the shadow areas which dry chalky. Then, I apply a thin layer of painting medium by Falens, which is the medium I use throughout the painting to loosen up my paints after squeezing them from the tubes. After that, I apply a final coat of Damar varnish and have never experienced cloudiness. My work is sold in galleries for the past four years, and I haven't received any phone calls about yellowing.
1- Am I using retouch varnish wrong? If so, how can I work with the chalkiness of a painting when I want to add new paint to the painting and cannot accurately see the values and temperature of chalky paint compared to fresh paint?
2- How long after use does the yellowing of Damar varnish begin?
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