If there are high surface finish requirements when edge bending/press brake, the Swedish product Tribotextil™ can be applied in the bending/pressing tool and mechanically protect the sheet metal from scratches and other damages. Tribotextil™ is an extremely thin and very strong textile that in this process replaces lubricants in the tool.
Ha! Nice. Suggested nearly this exact concept to someone trying to make wooden and 3D printed dies a few years ago. He didn't go for it, but figured it'd work.