Deface is the act of damaging or disfiguring something, so its antonyms would be words that mean the opposite. The first antonym that comes to mind is "enhance," which signifies improving something's appearance or making it even more beautiful. "Repair" is another great antonym, which means fixing or restoring something that had been damaged or broken. "Restore" is another excellent antonym for deface, meaning to bring something back to its original state or condition. Finally, "decorate" and "embellish" can also be antonyms for deface, as both words signify adding beauty and aesthetics to something.