I would go from store to store in Toronto and pick up whatever they threw out. One day, I was lucky enough to find a bunch of wallpaper rolls that were unused and left over from some job. The backs were blank, naturally. So it was a goldmine for me, and I went home with every roll I could carry. I kept using that wallpaper for a long time.
One was drawn on brown wrapping paper and the other was drawn on the back of wallpaper from Toronto. And DC approved them, just like that! It's incredible! But DC did say, 'We like your ideas, we like your scripts and we like your drawings. But please, copy over the stories in pen and ink on good paper.' So I got my mother and father to lend me the money to go out and buy some decent paper, the first drawing paper I ever had, in order to submit these stories properly to DC Comics.