I use old punch cards for a lot of uses that call for card stock. They are thin, and have a glossy coating that takes primer and paint well, so it doesn't soak up a lot of paint. But my supply is dwindling. I am starting to use the stuff real sparingly now. Anybody got an idea of where to get old punch cards?
Even after they are punched, many cards have only the first few columns punched, leaving the rest of the card fine, so used ones are fine. Last time I found one, it was a full box, around five pounds of cards, but haven't found a source in a long time.