I also discovered how wonderful spray varnish is when you are working with as smooth a surface as gessobord. I have always used a brush-on varnish and have really been struggling with varnishing these pieces on gessobord. Gessobord is such a smooth surface, it is hard to get a smooth finish without brush marks. I decided to break down and buy a can of spray varnish, and wow - what a difference!
"On My Own"
acrylic on gessobord