So with my texture mix you can reuse old paintings that no longer work for you. You can use gesso to do this too, particularly with acrylic paintings. But if you have oil paintings that have dried out completely (I’m talking years) then it is pretty safe to put a good layer of texture over the top before repainting.
I hate wasting canvases but if something doesn’t sell or I am just not happy with it then it has to go!