Gesso is wonderful stuff. Paint
this nearly-indestructible acrylic stuff on virtually any surface
and you can paint on it. Canvas, board, masonite,
newspring, paper mache, you name it. And one of the joys of
being an Art Student is learning all of
it is done stuff. But Gesso is tough stuff, don't use
that good $35 red sable brush, or let the stuff dry on it.
You can just toss it, cuz' that stuff ain't NEVER comin' out.