From Mario's Saatchi Art Interview: I don’t sketch. I plan, but I do it in my head. In most of my paintings, I start by throwing paint, trying not to overthink or anticipate anything. So my initial approach is – in part – based on chance, on small random accidents – it doesn’t rely exclusively on my persistence or technique. From then on, I keep adding layers of paint until I feel there’s nothing more I can do to make the piece consistent and somewhat complete. I can finish a painting in a few minutes or I can have it in my studio for weeks until I feel the piece has its own value and presence and there’s nothing more I can add to it.