This is a mailer from Freeport (IL) Hardware Company, probably in the 60s, promoting Du Pont’s Duco enamel for household use. It had been formulated as an automotive paint in the 20s.
What I thought amusing about the card was the thought that someone, blinded by the intense contrast between the green and the orange, would overlook that somewhat disguised step up into the dining room and faceplant on the shiny black floor.
Uncle Bob's Pix 