Around 4 years ago, we painted a chalkboard for our 1-year-old kid. She loved it and did all sorts of artwork on it. Now she is 5 years old and doesn't want the chalkboard anymore in her room.
On a suggestion from a home improvement store, I painted the Killz Latex based Primer over the blackboard. I cleaned the blackboard with a wet rag dipped in Dish Detergent and water, before applying the primer. I let the primer dry overnight. Now it looks like this.
I am planning to paint the entire wall with VALSPAR https://www.valspar.com/en/products/interior-paints-primers/signature-interior-paint-primer
Should I do a few more coats of the primer before applying the paint? How can I hide the blackboard completely?