Picture of Clean, strip, and sand the can
Pick a can. I used one from canned corn and another from pineapples. Eat the contents (optional but recommended), peel off the label, and scrub any glue or food gunk. I lightly sanded the surface so the paint would actually stick instead of sliding off like butter on a hot skillet. If you skip this, you’ll probably regret it. I did once. Never again.