Wheatpaste is a common adhesive used by street artists to post their work. Rosenfeld enlarged his photos and explored the idea of wheatpasting them on the street. He wasn’t convinced about the results so he tried using polyurethane instead of wheatpaste. He was shocked by the outcome, regular copy paper became similar to glossy photographic paper once polyurethane was applied to it. He calls his method “polypasting”.
This video shows the “polypasting” process:
Polyurethane also makes the paper transparent which allows for a better integration with the wall where the photo is posted.
Furthermore polypasting makes pieces very resistant to weather, they will last for years out in the open. And impressively enough, it allows spray paint to be stripped off without damaging the original piece. Rosenfeld loves it when his pieces get painted over allowing him to strip off some paint to create a new piece, he says its a collaboration with unknown.