Oil on panel
I primed couple of these canvas panels with transparent oxide red light,
and the paint was mixed&spread evenly with dammar varnish matt.
This gives a panel nice warm under color and also (slightly above) middle value starting point to a painting.
Matt varnish gives a nice smooth feel to it and it also diminishes the glare.
I highly recommend trying this out on landscape painting.
In winter scenes I would prefer yellow ochre, but still, I love to start on a white canvas most of the times.