First prime just the knots with the alkyd or stain-blocking acrylic primer or pigmented shellac (such as BIN). Let the primer ...

Primed canvas has already been coated with a primer, such as gesso. Unprimed canvas has not been coated. Primed canvas accepts the paint more easily. Gesso and acrylic primer come in jars ...

Primed canvas has already been coated with a primer, such as gesso. Unprimed canvas has not been coated. Primed canvas accepts the paint more easily. Gesso and acrylic primer come in jars ...