why would i need to varnish my painting
Varnish is a final layer applied to a painting after it is finished and completely dry. Itâs used on paintings that are not going to be framed under glass to protect them from dirt, dust, and pollution in the environment.y Tips on Varnishing a Painting. I used to find varnishing stressful as it is possible to muck it up. My fear was that I'd accidentally go over some varnish that had started to dry and cause it to go cloudy (and acrylic varnish dries very rapidly in a hot climate !).