Q- “Can I find a way to tape off a piece of cardboard so you can paint it without the cardboard ripping when you pull the tape off?”
A- “I Gesso.”
Yes, by trial and error I found that if you prime the cardboard before you paint it you can tape off an area and not rip off pieces of the cardboard as you remove the tape. I have the feeling that people who go to art school don’t have to learn these technical things by trial and error. Course people in art school probably don’t paint on cardboard much either. making art out of trash is its own area of study.
That’s what I’d like – a Trash Art 101 course. Basic materials science and art technique aimed toward learning to reuse junk and trash in art. The best way to paint on glass and plastic with cheap paint. Various decoupaging glues and their subtle differences. The rewards and dangers of working with various plastics. How to fasten and glue different materials. And how to paint on cardboard in a way that does not warp it or tear it. That kind of thing.
And I may have found a guy who offers something like it.