"Denepeedeerged" appears to be a phonetic or playful spelling of (découpage). Making a piece involves decorating an object—like a tray, frame, or furniture—by gluing paper cutouts onto it and sealing them for a professional finish. Quick Guide to Making a Decoupage Piece
Once dry, apply 1–2 protective top coats of your medium to seal everything in place. For furniture, a water-based sealer like Minwax Polycrylic is often recommended.
Clean and sand your object (wood, metal, or glass). You may want to paint it a light color first to make your paper designs "pop".
Brush a thin layer of a medium like Mod Podge or liquid patina onto the surface.
For beginners, starting with a simple project like a or picture frame is a great way to practice.